Triple

T19697110

Position	Surface form	Disambiguated ID	Type / Status
Subject	Brooklyn–Manhattan Transit Corporation subway network	`E472987`	entity
Predicate	hasLine	`P35`	FINISHED
Object	BMT Broadway Elevated Line (Brooklyn) The BMT Broadway Elevated Line in Brooklyn was an elevated rapid transit line that formed part of New York City’s early Brooklyn–Manhattan Transit (BMT) system, serving neighborhoods along Broadway before its eventual closure and demolition.	`E1408660`	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 Broadway Elevated Line (Brooklyn) | Statement: [Brooklyn–Manhattan Transit Corporation subway network, hasLine, BMT Broadway Elevated Line (Brooklyn)]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: BMT Broadway Elevated Line (Brooklyn)
Context triple: [Brooklyn–Manhattan Transit Corporation subway network, hasLine, BMT Broadway Elevated Line (Brooklyn)]

A. BMT Lexington Avenue Line (Brooklyn elevated)
The BMT Lexington Avenue Line (Brooklyn elevated) was an elevated rapid transit line in Brooklyn that formed part of the Brooklyn–Manhattan Transit Corporation system before its eventual demolition.
B. BMT Fulton Street Line (elevated)
The BMT Fulton Street Line (elevated) was a former elevated rapid transit line in Brooklyn that predated and was largely replaced by the modern IND Fulton Street subway.
C. 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.
D. BMT Fourth Avenue Line
The BMT Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn, running beneath Fourth Avenue and serving as a key corridor for multiple services.
E. BMT Canarsie Line
The BMT Canarsie Line is a New York City Subway rapid transit line in Brooklyn and Manhattan, best known for being served by the L train and running crosstown under 14th Street.
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 Broadway Elevated Line (Brooklyn)
Triple: [Brooklyn–Manhattan Transit Corporation subway network, hasLine, BMT Broadway Elevated Line (Brooklyn)]

Generated description

The BMT Broadway Elevated Line in Brooklyn was an elevated rapid transit line that formed part of New York City’s early Brooklyn–Manhattan Transit (BMT) system, serving neighborhoods along Broadway before its eventual closure and demolition.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: BMT Broadway Elevated Line (Brooklyn)
Target entity description: The BMT Broadway Elevated Line in Brooklyn was an elevated rapid transit line that formed part of New York City’s early Brooklyn–Manhattan Transit (BMT) system, serving neighborhoods along Broadway before its eventual closure and demolition.

A. BMT Lexington Avenue Line (Brooklyn elevated)
The BMT Lexington Avenue Line (Brooklyn elevated) was an elevated rapid transit line in Brooklyn that formed part of the Brooklyn–Manhattan Transit Corporation system before its eventual demolition.
B. BMT Fulton Street Line (elevated)
The BMT Fulton Street Line (elevated) was a former elevated rapid transit line in Brooklyn that predated and was largely replaced by the modern IND Fulton Street subway.
C. 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.
D. BMT Fourth Avenue Line
The BMT Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn, running beneath Fourth Avenue and serving as a key corridor for multiple services.
E. BMT Canarsie Line
The BMT Canarsie Line is a New York City Subway rapid transit line in Brooklyn and Manhattan, best known for being served by the L train and running crosstown under 14th Street.
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_69d8e515bef88190bc30781aea50537a`	completed	April 10, 2026, 11:55 a.m.
NER	Named-entity recognition	`batch_69e6421527b08190858788265043792d`	completed	April 20, 2026, 3:11 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a0815e9d7948190ac2bf27010c9d95e`	completed	May 16, 2026, 6:59 a.m.
NEDg	Description generation	`batch_6a0817235f808190ac9c6d26664861ce`	completed	May 16, 2026, 7:05 a.m.
NED2	Entity disambiguation (via description)	`batch_6a0817bf22d48190866d55484493be35`	completed	May 16, 2026, 7:07 a.m.

Created at: April 10, 2026, 1:46 p.m.