Triple
T893802
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | R train |
E19297
|
entity |
| Predicate | historicalPredecessor |
P97
|
FINISHED |
| Object |
BMT 2 (Fourth Avenue Local)
BMT 2 (Fourth Avenue Local) was a former Brooklyn–Manhattan Transit Corporation subway service that operated local trains along Brooklyn’s Fourth Avenue Line in New York City.
|
E106043
|
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: BMT 2 (Fourth Avenue Local) | Statement: [R train, historicalPredecessor, BMT 2 (Fourth Avenue Local)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: BMT 2 (Fourth Avenue Local) Context triple: [R train, historicalPredecessor, BMT 2 (Fourth Avenue Local)]
-
A.
BMT Nassau Street Line
The BMT Nassau Street Line is a New York City Subway line in Lower Manhattan that primarily carries J and Z trains through the Financial District.
-
B.
BMT Broadway Line
The BMT Broadway Line is a major New York City Subway trunk line in Manhattan, carrying N, Q, R, and W trains through Midtown and Lower Manhattan via Broadway.
-
C.
New York City Subway B line
The New York City Subway B line is an express service in the IND Sixth Avenue Line that runs through Manhattan and Brooklyn, serving major destinations including Yankee Stadium in the Bronx during certain times.
-
D.
Nostrand Avenue Line
The Nostrand Avenue Line is a New York City Subway route in Brooklyn that branches off the IRT Eastern Parkway Line to serve neighborhoods along Nostrand Avenue, terminating at Flatbush Avenue–Brooklyn College.
-
E.
New Lots Line
The New Lots Line is a New York City Subway line in Brooklyn that serves the easternmost portion of the IRT system, terminating at New Lots Avenue.
- 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: BMT 2 (Fourth Avenue Local) Triple: [R train, historicalPredecessor, BMT 2 (Fourth Avenue Local)]
Generated description
BMT 2 (Fourth Avenue Local) was a former Brooklyn–Manhattan Transit Corporation subway service that operated local trains along Brooklyn’s Fourth Avenue Line in New York City.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: BMT 2 (Fourth Avenue Local) Target entity description: BMT 2 (Fourth Avenue Local) was a former Brooklyn–Manhattan Transit Corporation subway service that operated local trains along Brooklyn’s Fourth Avenue Line in New York City.
-
A.
BMT Nassau Street Line
The BMT Nassau Street Line is a New York City Subway line in Lower Manhattan that primarily carries J and Z trains through the Financial District.
-
B.
BMT Broadway Line
The BMT Broadway Line is a major New York City Subway trunk line in Manhattan, carrying N, Q, R, and W trains through Midtown and Lower Manhattan via Broadway.
-
C.
New York City Subway B line
The New York City Subway B line is an express service in the IND Sixth Avenue Line that runs through Manhattan and Brooklyn, serving major destinations including Yankee Stadium in the Bronx during certain times.
-
D.
Nostrand Avenue Line
The Nostrand Avenue Line is a New York City Subway route in Brooklyn that branches off the IRT Eastern Parkway Line to serve neighborhoods along Nostrand Avenue, terminating at Flatbush Avenue–Brooklyn College.
-
E.
New Lots Line
The New Lots Line is a New York City Subway line in Brooklyn that serves the easternmost portion of the IRT system, terminating at New Lots Avenue.
- 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_69a4939d37188190848be3d426ebc9ae |
completed | March 1, 2026, 7:29 p.m. |
| NER | Named-entity recognition | batch_69a4ad212cd8819091eb1b7d606f5afd |
completed | March 1, 2026, 9:18 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69a7c02772208190ac86dd885728e89c |
completed | March 4, 2026, 5:16 a.m. |
| NEDg | Description generation | batch_69a7c2f036548190bc018c0cbe02d0ca |
completed | March 4, 2026, 5:28 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69a7c38925b481909133a1b098b08fa9 |
completed | March 4, 2026, 5:30 a.m. |
Created at: March 1, 2026, 7:39 p.m.