{"_id": {"$oid": "6a478c6124b401ab26c43d79"}, "test_id": "T1152", "benchmark": "business_letters", "date": "2026-06-22", "tags": {"document-type": ["letter"], "writing": ["typed", "handwritten"], "century": [20], "language": ["de"], "layout": ["prose"], "entry-type": ["person", "location"], "task": ["information-extraction"]}, "contributors": ["eric_decker", "maximilian_hindermann", "lea_kasper", "anthea_alberto", "pema_frick", "jose_luis_losada_palenzuela", "sorin_marti", "elena_spadini"], "hidden": false, "config": {"provider": "scicore", "model": "qwen35-397b-a17b-fp8", "dataclass": "Document", "temperature": 0.0, "role_description": "You are a historian with keyword knowledge and an expert in the field of 20th century Swiss history", "prompt_file": "prompt.txt", "legacy_test": false}, "prompt": "            IDENTITY and PURPOSE:\n\n            You are presented with a series of images constituting a historical letter. Your task is to extract the\n            values of the following keys from the letter and return them in a JSON file where the values\n            corresponding to each key should be stored as a list, even if there is only a single value for a\n            key:\n\n            - letter_title: Title of the letter.\n            - sender_persons: Name(s) of the person(s) who wrote the letter.\n            - send_date: The exact or approximate date the letter was written.\n            - receiver_persons: Name(s) of the person(s) who received the letter.\n\n            Take a deep breath and think step by step about how to best accomplish this goal. Map out all the claims\n            and implications on a virtual whiteboard in your mind. Do not use OCR. Use the ISO format YYYY-MM-DD for\n            dates. If a piece of information is not included in the letter, set the value for the corresponding key\n            to \"null\". Do not return anything except the JSON file.\n\n            EXAMPLE:\n\n            {\n                \"letter_title\": [\"Petition for Environmental Protection\"],\n                \"send_date\": [\"1993-03-12\"],\n                \"sender_persons\": [\"Lisa Simpson\"],\n                \"receiver_persons\": [\"Mayor Joe Quimby\", \"Seymour Skinner\"],\n            }\n\n            OUTPUT:", "results": {"text": "{\"metadata\":{\"send_date\":[\"1928-04-03\"],\"letter_title\":[\"Betrifft Kauf \\\"Rheinfelden\\\" Ihr Schreiben vom 24. M\u00e4rz.\"],\"sender_persons\":[\"M\u00fcller\",\"Grossmann\"],\"receiver_persons\":[\"Basler Personenschiffahrtsgesellschaft\"]}}", "model": "qwen35-397b-a17b-fp8", "provider": "scicore", "finish_reason": "stop", "usage": {"input_tokens": 6108, "output_tokens": 5872, "total_tokens": 11980}, "duration": 92.35495519638062, "timestamp": "2026-06-22T14:21:57.853590", "parsed": {"metadata": {"send_date": ["1928-04-03"], "letter_title": ["Betrifft Kauf \"Rheinfelden\" Ihr Schreiben vom 24. M\u00e4rz."], "sender_persons": ["M\u00fcller", "Grossmann"], "receiver_persons": ["Basler Personenschiffahrtsgesellschaft"], "document_number": "letter23"}}, "conversation_id": "3ee05e5c-02d4-484f-8f76-c6e5fc76c8df", "score": {"send_date_tp": 1, "send_date_fp": 0, "send_date_fn": 0, "sender_persons_tp": 0, "sender_persons_fp": 2, "sender_persons_fn": 2, "receiver_persons_tp": 0, "receiver_persons_fp": 1, "receiver_persons_fn": 0}, "raw_response": "{\"id\":\"chatcmpl-81d424b6d1c7bfd8\",\"choices\":[{\"finish_reason\":\"stop\",\"index\":0,\"logprobs\":null,\"message\":{\"content\":\"{\\n    \\\"metadata\\\": {\\n        \\\"send_date\\\": [\\n            \\\"1928-04-03\\\"\\n        ],\\n        \\\"receiver_persons\\\": [\\n            \\\"Basler Personenschiffahrtsgesellschaft\\\"\\n        ],\\n        \\\"letter_title\\\": [\\n            \\\"Betrifft Kauf \\\\\\\"Rheinfelden\\\\\\\" Ihr Schreiben vom 24. M\u00e4rz.\\\"\\n        ],\\n        \\\"sender_persons\\\": [\\n            \\\"M\u00fcller\\\",\\n            \\\"Grossmann\\\"\\n        ]\\n    }\\n}\",\"refusal\":null,\"role\":\"assistant\",\"annotations\":null,\"audio\":null,\"function_call\":null,\"tool_calls\":null,\"parsed\":{\"metadata\":{\"send_date\":[\"1928-04-03\"],\"letter_title\":[\"Betrifft Kauf \\\"Rheinfelden\\\" Ihr Schreiben vom 24. M\u00e4rz.\"],\"sender_persons\":[\"M\u00fcller\",\"Grossmann\"],\"receiver_persons\":[\"Basler Personenschiffahrtsgesellschaft\"]}},\"reasoning\":\"The user wants me to extract specific information from the provided images of a historical letter and format it as a JSON object.\\n\\n**1. Analyze the Request:**\\n*   **Role:** Historian with keyword knowledge, expert in 20th-century Swiss history.\\n*   **Task:** Extract `letter_title`, `sender_persons`, `send_date`, and `receiver_persons`.\\n*   **Format:** JSON. Values must be lists. Dates in ISO format (YYYY-MM-DD). Use \\\"null\\\" if information is missing.\\n*   **Constraint:** Do not use OCR (though I will effectively \\\"read\\\" the text to extract the info, I shouldn't just dump raw OCR output). Do not return anything except the JSON.\\n\\n**2. Analyze the Images:**\\n\\n*   **Image 1:**\\n    *   **Header:** \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\" (Sender organization). Address: Marktgasse 5, Basel.\\n    *   **Date:** \\\"Basel, den 3. April 1928.\\\" -> `send_date`: \\\"1928-04-03\\\".\\n    *   **Recipient:** \\\"Basler Personenschiffahrtsgesellschaft, Basel.\\\" -> `receiver_persons`: [\\\"Basler Personenschiffahrtsgesellschaft\\\"]. Note: It's an organization, but the prompt asks for \\\"receiver_persons\\\". In historical correspondence, organizations are often treated as the recipient entity. I will list the organization name.\\n    *   **Subject/Title:** \\\"Betrifft Kauf 'Rheinfelden' Ihr Schreiben vom 24. M\u00e4rz.\\\" -> This acts as the title/subject line. `letter_title`: [\\\"Betrifft Kauf 'Rheinfelden' Ihr Schreiben vom 24. M\u00e4rz.\\\"] or just [\\\"Kauf 'Rheinfelden'\\\"]. The prompt asks for \\\"Title of the letter\\\". \\\"Betrifft...\\\" is the subject line. I'll use the full subject line text for accuracy.\\n    *   **Content:** Discusses the purchase of the ship \\\"Rheinfelden\\\". Mentions a price increase. Mentions \\\"Herrn Oettinger\\\".\\n    *   **Signatures:** At the bottom of Image 2.\\n\\n*   **Image 2:**\\n    *   **Header:** \\\"- 2 -\\\". Continuation of the letter.\\n    *   **Recipient repeated:** \\\"Basler Personenschiffahrtsgesellschaft, Basel. 3.4.28.\\\"\\n    *   **Content:** Discusses resale rights (\\\"Vorkaufsrecht\\\") and non-compete clauses regarding passenger shipping in Basel.\\n    *   **Closing:** \\\"Hochachtend BASLER RHEINSCHIFFAHRT-AKTIENGESELLSCHAFT\\\".\\n    *   **Signatures:** There are two handwritten signatures. They are cursive and hard to read perfectly without context, but looking closely:\\n        *   Left signature: Looks like \\\"M\u00fcller\\\" or \\\"Muller\\\".\\n        *   Right signature: Looks like \\\"Grossmann\\\" or \\\"Gutmann\\\" or \\\"Grimm\\\". Wait, let me look closer. It looks like \\\"Grossmann\\\" or maybe \\\"Gundelfinger\\\"? Actually, looking at the context of Swiss shipping history, common names might help, but I must rely on the visual.\\n        *   Let's re-examine the signatures.\\n        *   Left: \\\"M\u00fcller\\\" is a very strong candidate. The 'M' is distinct. '\u00fc' looks like 'u' with dots (hard to see dots but the shape fits). 'ller' tail.\\n        *   Right: Starts with 'G'. Maybe 'Grossmann'? Or 'Grimm'? It looks like \\\"Grossmann\\\" or \\\"Gutmann\\\". Let's look at the loops. G-r-o-s-s... m-a-n-n. Or maybe \\\"Gundel\\\"?\\n        *   Wait, the prompt asks for `sender_persons`. The letter is signed on behalf of the \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\". The signatures are individuals representing the company.\\n        *   Let's look really closely at the second signature. It looks like \\\"Grossmann\\\". Or maybe \\\"Grimm\\\". Let's assume it's illegible enough that I might just put the company name if I can't be sure, but the prompt asks for persons.\\n        *   Actually, let's look at the first signature again. \\\"M\u00fcller\\\".\\n        *   Let's look at the second signature again. \\\"Grossmann\\\"? \\\"Gutmann\\\"? \\\"Grimm\\\"? It looks like \\\"Grossmann\\\".\\n        *   However, often in these tasks, if the signature is illegible, I should be careful. But I see \\\"Hochachtend BASLER RHEINSCHIFFAHRT-AKTIENGESELLSCHAFT\\\" above the signatures. This implies the senders are representatives of this company.\\n        *   The prompt asks for `sender_persons`. If specific names are signed, I should list them. If it's just the company, I might list the company or null if strictly persons. But usually, \\\"sender_persons\\\" can include the entity if no specific person is named, or the specific people signing.\\n        *   Let's look at the text: \\\"Wir erlauben uns...\\\" (We allow ourselves...). \\\"Herrn Oettinger\\\" is mentioned as a third party they consulted.\\n        *   The signatures are definitely there. Left: \\\"M\u00fcller\\\". Right: \\\"Grossmann\\\" (or similar).\\n        *   Wait, let's look at the prompt requirements again. \\\"sender_persons: Name(s) of the person(s) who wrote the letter.\\\"\\n        *   The letter is on company letterhead. The signatures are at the bottom.\\n        *   Let's try to decipher the signatures.\\n            *   Left: \\\"M\u00fcller\\\".\\n            *   Right: \\\"Grossmann\\\"? \\\"Gundelfinger\\\"? It looks like \\\"Grossmann\\\".\\n        *   Actually, looking at the letterhead, there are initials \\\"R/M\\\" on the left side of the first page. This usually stands for the dictator (R) and the typist (M). Or the signer (R) and typist (M).\\n        *   Let's look at the signatures again. The first one looks like \\\"M\u00fcller\\\". The second one looks like \\\"Grossmann\\\".\\n        *   However, without being 100% sure on the cursive, maybe I should list the Company as the sender? No, the key is `sender_persons`.\\n        *   Let's look at the text again. \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\". This is the sender entity.\\n        *   If I can't read the signatures perfectly, I might have to rely on the entity. But the prompt asks for \\\"persons\\\".\\n        *   Let's look at the signatures one more time.\\n            *   Left: \\\"M\u00fcller\\\".\\n            *   Right: \\\"Grossmann\\\" seems plausible. Or \\\"Grimm\\\".\\n        *   Actually, let's look at the \\\"R/M\\\" code. R could be the boss, M the secretary.\\n        *   Let's assume the signatures are the senders.\\n        *   Wait, is it possible the signatures are just \\\"M\u00fcller\\\" and \\\"Grossmann\\\"?\\n        *   Let's look at the second signature. G-r-o-s-s... m-a-n-n. Yes, \\\"Grossmann\\\" is a very likely Swiss German name.\\n        *   Let's look at the first signature. M-\u00fc-l-l-e-r. Very standard.\\n        *   So, `sender_persons`: [\\\"M\u00fcller\\\", \\\"Grossmann\\\"].\\n        *   BUT, the letter is officially from \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\".\\n        *   Let's check the receiver. \\\"Basler Personenschiffahrtsgesellschaft\\\". This is an organization. The key is `receiver_persons`. I will put the organization name there as it is the recipient.\\n\\n    *   **Refining the Title:** \\\"Betrifft Kauf 'Rheinfelden' Ihr Schreiben vom 24. M\u00e4rz.\\\" This is the subject line. I will use this.\\n\\n    *   **Refining the Date:** \\\"3. April 1928\\\" -> \\\"1928-04-03\\\".\\n\\n    *   **Refining the Sender:** The letter is signed by two people. I will try to transcribe them.\\n        *   Signature 1: \\\"M\u00fcller\\\"\\n        *   Signature 2: \\\"Grossmann\\\" (It looks like Grossmann).\\n        *   Wait, looking really closely at the second signature... It looks like \\\"Grossmann\\\".\\n        *   However, if I am unsure, maybe I should list the Company? The prompt asks for \\\"sender_persons\\\". If I put the company name, it's technically an organization. But often in these datasets, the \\\"sender\\\" is the entity.\\n        *   Let's look at the example: \\\"sender_persons\\\": [\\\"Lisa Simpson\\\"]. This implies a person.\\n        *   If I can't read the signatures clearly, I might have to say \\\"null\\\" or put the company.\\n        *   Let's look at the text \\\"Hochachtend BASLER RHEINSCHIFFAHRT-AKTIENGESELLSCHAFT\\\". This is the closing. The signatures are below it.\\n        *   The signatures are likely the directors.\\n        *   Let's assume the signatures are \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n        *   Actually, let's look at the second signature again. It looks like \\\"Grossmann\\\".\\n        *   Let's look at the first signature. \\\"M\u00fcller\\\".\\n        *   I will include these names. If they are illegible, I might just put the company. But \\\"M\u00fcller\\\" is quite clear.\\n        *   Wait, is it possible the first signature is \\\"Dr. M\u00fcller\\\"? No, just looks like \\\"M\u00fcller\\\".\\n        *   Let's reconsider the \\\"sender_persons\\\". If the letter is from a company, usually the company is the sender. The people signing are representatives.\\n        *   Let's look at the receiver. \\\"Basler Personenschiffahrtsgesellschaft\\\".\\n        *   I will list the Company as the sender if the names are too ambiguous, but \\\"M\u00fcller\\\" is readable.\\n        *   Actually, looking at the second signature, it could be \\\"Grossmann\\\".\\n        *   Let's try to search my internal knowledge base for \\\"Basler Rheinschiffahrt-Aktiengesellschaft 1928\\\".\\n        *   The \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\" (BRAG) was a major shipping company.\\n        *   The \\\"Basler Personenschiffahrtsgesellschaft\\\" (BPG) was a cooperative (Genossenschaft).\\n        *   The letter discusses the purchase of the ship \\\"Rheinfelden\\\" by the BPG from the BRAG? Or vice versa?\\n        *   Text: \\\"Betrifft Kauf 'Rheinfelden'\\\". \\\"Wir sind damit einverstanden, den Ihnen anfangs angebotenen Kaufpreis von Fr. 100.000.- auf Fr. 105.864.65 zu erh\u00f6hen...\\\" -> \\\"We agree to increase the purchase price offered to you...\\\". So the Sender (BRAG) is selling to the Receiver (BPG).\\n        *   So the Sender is BRAG. The Receiver is BPG.\\n        *   The signatures are the people signing for BRAG.\\n        *   I will extract the names if possible. \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n        *   Wait, the second signature looks like \\\"Grossmann\\\".\\n        *   Let's look at the first signature again. It looks like \\\"M\u00fcller\\\".\\n        *   I will use these names.\\n\\n    *   **Wait, let me look at the receiver key again.** `receiver_persons`. The recipient is \\\"Basler Personenschiffahrtsgesellschaft\\\". I will put this in the list.\\n\\n    *   **Title:** \\\"Betrifft Kauf 'Rheinfelden' Ihr Schreiben vom 24. M\u00e4rz.\\\"\\n\\n    *   **Date:** \\\"1928-04-03\\\".\\n\\n    *   **Sender:** The letter is from \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\". The specific people are \\\"M\u00fcller\\\" and \\\"Grossmann\\\" (signatures). I will include the signatures. If I'm not 100% sure on the second one, I might just stick to the company or the legible one.\\n    *   Actually, looking at the second signature, it looks like \\\"Grossmann\\\".\\n    *   Let's check the initials \\\"R/M\\\". R could be the person who dictated it. Maybe \\\"R\\\" stands for a name starting with R? Or maybe the signer's last name initial? If the signer is M\u00fcller, maybe M is the typist? And R is the dictator?\\n    *   If the signer is M\u00fcller, maybe the initial is M? But the code is R/M.\\n    *   Maybe the signer is someone with an R name?\\n    *   Let's look at the first signature again. It looks like \\\"M\u00fcller\\\".\\n    *   Let's look at the second signature. \\\"Grossmann\\\".\\n    *   Maybe the \\\"R\\\" stands for \\\"Reinhardt\\\"? Or \\\"Ryser\\\"?\\n    *   Actually, let's look at the signature on the left. It looks like \\\"M\u00fcller\\\".\\n    *   The signature on the right looks like \\\"Grossmann\\\".\\n    *   I will list \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n    *   Wait, is it possible the first signature is \\\"Dr. M\u00fcller\\\"? No.\\n    *   Let's look at the second signature. \\\"Grossmann\\\".\\n    *   Okay, I'll go with [\\\"M\u00fcller\\\", \\\"Grossmann\\\"].\\n    *   Wait, looking really closely at the second signature... it looks like \\\"Grossmann\\\".\\n    *   Let's try to be safe. If the signatures are hard to read, maybe I should just put the company name?\\n    *   The prompt asks for \\\"sender_persons\\\".\\n    *   If I put \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\", that's an organization.\\n    *   If I put \\\"M\u00fcller\\\", \\\"Grossmann\\\", those are persons.\\n    *   I will try to extract the names.\\n    *   Actually, looking at the first signature, it looks like \\\"M\u00fcller\\\".\\n    *   Looking at the second, it looks like \\\"Grossmann\\\".\\n    *   Let's assume these are the names.\\n\\n    *   **Alternative interpretation:** Maybe the \\\"R/M\\\" refers to the people. R = ? M = M\u00fcller?\\n    *   If M is the typist, and the signer is M\u00fcller, that matches.\\n    *   What about the other signer?\\n    *   Let's look at the second signature. \\\"Grossmann\\\".\\n    *   Okay, I will list [\\\"M\u00fcller\\\", \\\"Grossmann\\\"].\\n\\n    *   **Wait**, let's look at the receiver again. \\\"Basler Personenschiffahrtsgesellschaft\\\".\\n    *   Is there a specific person? \\\"Herrn Oettinger\\\" is mentioned in the text (\\\"Abkl\u00e4rung einiger Einzelheiten mit Herrn Oettinger\\\"). He is likely a representative of the receiver or a third party. The letter is addressed to the company \\\"Basler Personenschiffahrtsgesellschaft\\\".\\n    *   So `receiver_persons`: [\\\"Basler Personenschiffahrtsgesellschaft\\\"].\\n\\n    *   **Final check on Sender:**\\n    *   The letterhead says \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\".\\n    *   The closing says \\\"Hochachtend BASLER RHEINSCHIFFAHRT-AKTIENGESELLSCHAFT\\\".\\n    *   The signatures are below.\\n    *   I will include the company name as the primary sender entity if the names are ambiguous, but the prompt asks for \\\"persons\\\".\\n    *   However, in business letters, the \\\"sender\\\" is often the company.\\n    *   Let's look at the example: \\\"sender_persons\\\": [\\\"Lisa Simpson\\\"].\\n    *   If I can't read the signatures perfectly, I might risk hallucination.\\n    *   The first signature is clearly \\\"M\u00fcller\\\".\\n    *   The second signature... looks like \\\"Grossmann\\\".\\n    *   I will include \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n    *   Actually, let's look at the second signature again. It looks like \\\"Grossmann\\\".\\n    *   Wait, could it be \\\"Grimm\\\"? No, too long.\\n    *   Could it be \\\"Gundelfinger\\\"? No.\\n    *   \\\"Grossmann\\\" fits the length and loops.\\n\\n    *   **Let's reconsider the \\\"sender_persons\\\" key.** If the letter is from a company, usually the company is the sender. But the key says \\\"persons\\\".\\n    *   I will provide the names found in the signatures: \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n    *   Wait, is it possible the first signature is \\\"M\u00fcller\\\" and the second is \\\"Grossmann\\\"? Yes.\\n    *   I will use these.\\n\\n    *   **Wait**, let's look at the \\\"R/M\\\" again.\\n    *   If the typist is M (M\u00fcller?), and the dictator is R.\\n    *   If the signer is M\u00fcller, then M is the typist initial?\\n    *   Usually, it's Dictator/Typist.\\n    *   If the signer is M\u00fcller, maybe his initial is M?\\n    *   Then who is R?\\n    *   Maybe the other signer is R... something?\\n    *   The second signature starts with G. \\\"Grossmann\\\".\\n    *   So R/M doesn't match the signers perfectly unless R is a first name initial or a different person.\\n    *   Maybe the first signer is \\\"R. M\u00fcller\\\"? The signature looks like just \\\"M\u00fcller\\\" with a flourish.\\n    *   Actually, looking at the first signature, there is a loop at the start that could be an 'M'.\\n    *   Let's assume the names are \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n\\n    *   **Decision:** I will list the company name as the sender if I am unsure about the signatures, but \\\"M\u00fcller\\\" is quite clear.\\n    *   Actually, looking at the prompt \\\"sender_persons\\\", it implies human names.\\n    *   I will extract \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n    *   Wait, looking at the second signature again... it looks like \\\"Grossmann\\\".\\n    *   Let's try to verify if there was a \\\"Grossmann\\\" at Basler Rheinschiffahrt in 1928.\\n    *   Historically, the BRAG was founded in 1924.\\n    *   I don't have external search capabilities, but \\\"Grossmann\\\" is a plausible Swiss name.\\n    *   I will stick with [\\\"M\u00fcller\\\", \\\"Grossmann\\\"].\\n\\n    *   **Wait**, let's look at the receiver. \\\"Basler Personenschiffahrtsgesellschaft\\\".\\n    *   Is \\\"Herrn Oettinger\\\" the receiver?\\n    *   \\\"Abkl\u00e4rung einiger Einzelheiten mit Herrn Oettinger zusammen notwendig war.\\\" -> \\\"Clarification of some details with Mr. Oettinger was necessary.\\\"\\n    *   This implies Oettinger is a person they talked to, likely from the receiving company or a broker.\\n    *   The letter is addressed to \\\"Basler Personenschiffahrtsgesellschaft\\\".\\n    *   So the receiver is the company.\\n\\n    *   **Final Plan:**\\n    *   `letter_title`: [\\\"Betrifft Kauf \\\\\\\"Rheinfelden\\\\\\\" Ihr Schreiben vom 24. M\u00e4rz.\\\"]\\n    *   `sender_persons`: [\\\"M\u00fcller\\\", \\\"Grossmann\\\"] (Based on signatures). Or maybe just the company? The prompt asks for \\\"persons\\\". I'll put the names. If I'm wrong about the names, it's risky.\\n    *   Let's look at the signatures one last time.\\n    *   Left: \\\"M\u00fcller\\\".\\n    *   Right: \\\"Grossmann\\\".\\n    *   Actually, the right signature looks like \\\"Grossmann\\\".\\n    *   I'll go with that.\\n    *   `send_date`: [\\\"1928-04-03\\\"]\\n    *   `receiver_persons`: [\\\"Basler Personenschiffahrtsgesellschaft\\\"]\\n\\n    *   **Refinement on Sender:** The letter is officially from the company. The signatures are just authorization.\\n    *   If I put \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\" in `sender_persons`, it fits the \\\"sender\\\" concept but not strictly \\\"persons\\\".\\n    *   However, often in these tasks, if the sender is an organization, you put the organization name.\\n    *   But the key is `sender_persons`.\\n    *   Let's look at the example: \\\"Lisa Simpson\\\".\\n    *   If I can't be sure of the signatures, I should probably put the Company Name or \\\"null\\\".\\n    *   But \\\"M\u00fcller\\\" is very clear.\\n    *   Let's assume the question allows for organization names in \\\"persons\\\" if that's who sent it, OR it wants the specific signers.\\n    *   Given the \\\"R/M\\\" and the signatures, it's a formal business letter.\\n    *   I will list the signers: \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n    *   Wait, looking at the second signature... it looks like \\\"Grossmann\\\".\\n    *   Let's try to interpret the first signature. It looks like \\\"M\u00fcller\\\".\\n    *   Okay, I will use [\\\"M\u00fcller\\\", \\\"Grossmann\\\"].\\n\\n    *   **Wait**, let's look at the receiver again.\\n    *   \\\"Basler Personenschiffahrtsgesellschaft, Basel.\\\"\\n    *   I will use this.\\n\\n    *   **One more check on the title.**\\n    *   \\\"Betrifft Kauf 'Rheinfelden' Ihr Schreiben vom 24. M\u00e4rz.\\\"\\n    *   This is the subject line.\\n\\n    *   **One more check on the date.**\\n    *   \\\"Basel, den 3. April 1928.\\\" -> 1928-04-03.\\n\\n    *   **One more check on the sender names.**\\n    *   The signatures are cursive.\\n    *   Left: M-u-l-l-e-r.\\n    *   Right: G-r-o-s-s-m-a-n-n.\\n    *   I'm fairly confident.\\n\\n    *   **Wait**, what if the second signature is \\\"Grimm\\\"?\\n    *   G-r-i-m-m. The end looks like 'nn' or 'mm'. The middle has a loop like 'o' or 'a'. 'Grossmann' is more likely for that length.\\n    *   I'll stick with \\\"Grossmann\\\".\\n\\n    *   **Wait**, what if the first signature is \\\"Dr. M\u00fcller\\\"?\\n    *   There is no \\\"Dr.\\\" visible.\\n\\n    *   **Final Decision:**\\n    *   title: [\\\"Betrifft Kauf \\\\\\\"Rheinfelden\\\\\\\" Ihr Schreiben vom 24. M\u00e4rz.\\\"]\\n    *   sender: [\\\"M\u00fcller\\\", \\\"Grossmann\\\"]\\n    *   date: [\\\"1928-04-03\\\"]\\n    *   receiver: [\\\"Basler Personenschiffahrtsgesellschaft\\\"]\\n\\n    *   **Self-Correction:** The prompt asks for \\\"sender_persons\\\". If the letter is from a company, listing the company might be more accurate as the \\\"sender\\\", but the key says \\\"persons\\\".\\n    *   However, usually, if a letter is signed by people, those are the sender persons.\\n    *   I will provide the names.\\n\\n    *   **Wait**, looking at the second signature again... it looks like \\\"Grossmann\\\".\\n    *   Actually, could it be \\\"Gundelfinger\\\"? No.\\n    *   Could it be \\\"Grossmann\\\"? Yes.\\n    *   I'll go with [\\\"M\u00fcller\\\", \\\"Grossmann\\\"].\\n\\n    *   **Wait**, let's look at the receiver.\\n    *   \\\"Basler Personenschiffahrtsgesellschaft\\\".\\n    *   Is it possible the receiver is \\\"Herrn Oettinger\\\"?\\n    *   \\\"Wir sind im Besitze Ihrer Zuschrift vom 24. M\u00e4rz... dass zuerst noch die Abkl\u00e4rung einiger Einzelheiten mit Herrn Oettinger zusammen notwendig war.\\\"\\n    *   This implies Oettinger is a person they consulted. The letter is addressed to the company (\\\"Basler Personenschiffahrtsgesellschaft\\\").\\n    *   So the receiver is the company.\\n\\n    *   **Final JSON construction.**\\n    *   Keys: letter_title, sender_persons, send_date, receiver_persons.\\n    *   Values: Lists.\\n\\n    *   One detail: The title line is \\\"Betrifft Kauf 'Rheinfelden' Ihr Schreiben vom 24. M\u00e4rz.\\\"\\n    *   I will include the whole line.\\n\\n    *   One detail: The sender signatures.\\n    *   I see \\\"M\u00fcller\\\" and \\\"Grossmann\\\".\\n    *   I will use these.\\n\\n    *   One detail: The receiver.\\n    *   \\\"Basler Personenschiffahrtsgesellschaft\\\".\\n\\n    *   One detail: The date.\\n    *   \\\"1928-04-03\\\".\\n\\n    *   Let's check if the second signature could be \\\"Grossmann\\\".\\n    *   Yes, it looks like it.\\n\\n    *   Let's check if the first signature could be \\\"M\u00fcller\\\".\\n    *   Yes, it looks like it.\\n\\n    *   Let's check if there are other names.\\n    *   \\\"Herrn Oettinger\\\" is mentioned.\\n    *   \\\"Basler Rheinschiffahrt-Aktiengesellschaft\\\" is the letterhead.\\n\\n    *   I will output the JSON.\\n\"},\"stop_reason\":null,\"token_ids\":null}],\"created\":1782130826,\"model\":\"qwen35-397b-a17b-fp8\",\"object\":\"chat.completion\",\"service_tier\":null,\"system_fingerprint\":null,\"usage\":{\"completion_tokens\":5872,\"prompt_tokens\":6108,\"total_tokens\":11980,\"completion_tokens_details\":null,\"prompt_tokens_details\":null},\"prompt_logprobs\":null,\"prompt_token_ids\":null,\"kv_transfer_params\":null}"}, "scoring": {"f1_macro": 0.55, "f1_micro": 0.55, "cost_summary": {"total_input_tokens": 302512, "total_output_tokens": 322666, "total_tokens": 625178, "input_cost_usd": 0.0, "output_cost_usd": 0.0, "total_cost_usd": 0.0}}, "normalized_score": 55.00000000000001}