Triple
T4927974
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | San Francisco Muni historic streetcars |
E110622
|
entity |
| Predicate | hasPart |
P35
|
FINISHED |
| Object |
Brooklyn streetcar
The Brooklyn streetcar is a preserved historic trolley car from Brooklyn, New York, now operated as part of San Francisco’s vintage streetcar fleet.
|
E482291
|
NE FINISHED |
How this triple was built (4 steps)
Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.
NER
Named-entity recognition
gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Brooklyn streetcar | Statement: [San Francisco Muni historic streetcars, hasPart, Brooklyn streetcar]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Brooklyn streetcar Context triple: [San Francisco Muni historic streetcars, hasPart, Brooklyn streetcar]
-
A.
Brill streetcar
The Brill streetcar is a historic electric tramcar model built by the J.G. Brill Company, known for its early 20th-century use in urban street railway systems and preservation in heritage streetcar fleets.
-
B.
Mattapan Trolley
The Mattapan Trolley is a historic light rail line in Boston that operates vintage PCC streetcars between Ashmont and Mattapan stations.
-
C.
Brooklyn–Manhattan service
Brooklyn–Manhattan service is a New York City Subway service pattern that operates trains between Brooklyn and Manhattan along the BMT Jamaica Line and connecting routes.
-
D.
Roosevelt Island Tramway
The Roosevelt Island Tramway is an aerial cable car system in New York City that connects Roosevelt Island to Manhattan, offering both public transit and scenic views of the skyline.
-
E.
Brooklyn Elevated Railroad
The Brooklyn Elevated Railroad was a late 19th- and early 20th-century elevated railway company in Brooklyn, New York City, that operated several rapid transit lines before being absorbed into the city’s unified transit system.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg
Description generation
gpt-5.1
Instruction
Generate a one-sentence description of the target entity. You are given a context triple in the form (subject, predicate, object), where the object is the target entity. # Instructions Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. Avoid repeating the information from the triple, unless really essential. # Response Format Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Brooklyn streetcar Triple: [San Francisco Muni historic streetcars, hasPart, Brooklyn streetcar]
Generated description
The Brooklyn streetcar is a preserved historic trolley car from Brooklyn, New York, now operated as part of San Francisco’s vintage streetcar fleet.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Brooklyn streetcar Target entity description: The Brooklyn streetcar is a preserved historic trolley car from Brooklyn, New York, now operated as part of San Francisco’s vintage streetcar fleet.
-
A.
Brill streetcar
The Brill streetcar is a historic electric tramcar model built by the J.G. Brill Company, known for its early 20th-century use in urban street railway systems and preservation in heritage streetcar fleets.
-
B.
Mattapan Trolley
The Mattapan Trolley is a historic light rail line in Boston that operates vintage PCC streetcars between Ashmont and Mattapan stations.
-
C.
Brooklyn–Manhattan service
Brooklyn–Manhattan service is a New York City Subway service pattern that operates trains between Brooklyn and Manhattan along the BMT Jamaica Line and connecting routes.
-
D.
Roosevelt Island Tramway
The Roosevelt Island Tramway is an aerial cable car system in New York City that connects Roosevelt Island to Manhattan, offering both public transit and scenic views of the skyline.
-
E.
Brooklyn Elevated Railroad
The Brooklyn Elevated Railroad was a late 19th- and early 20th-century elevated railway company in Brooklyn, New York City, that operated several rapid transit lines before being absorbed into the city’s unified transit system.
- F. None of above. chosen
Provenance (5 batches)
The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.
| Step | Stage | Batch ID | Status | When |
|---|---|---|---|---|
| creating | Elicitation | batch_69bd4415190c8190817bee7ec9f9f944 |
completed | March 20, 2026, 12:56 p.m. |
| NER | Named-entity recognition | batch_69bd7036d8e88190bc4be2975160da23 |
completed | March 20, 2026, 4:05 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69be81c2cb288190b0a603992c08235c |
completed | March 21, 2026, 11:32 a.m. |
| NEDg | Description generation | batch_69be83318d948190a5fb3d7cf8cff497 |
completed | March 21, 2026, 11:38 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69be839b52bc8190aeddc775913254b4 |
completed | March 21, 2026, 11:40 a.m. |
Created at: March 20, 2026, 1:30 p.m.