BMT lines
E192138
BMT lines are a group of New York City Subway routes that originated with the former Brooklyn–Manhattan Transit Corporation and primarily serve Brooklyn and Manhattan.
All labels observed (7)
| Label | Occurrences |
|---|---|
| BMT lines canonical | 5 |
| B D F M subway lines | 1 |
| BMT elevated services | 1 |
| BMT elevated system | 1 |
| BMT trains | 1 |
| BMT trunk lines | 1 |
| Brooklyn–Manhattan Transit Corporation lines | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1700256 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: BMT lines Context triple: [R179 subway cars, usedOn, BMT lines]
-
A.
BMT Myrtle Avenue Line
The BMT Myrtle Avenue Line is a New York City Subway line in Brooklyn and Queens that primarily carries the M train along an elevated route.
-
B.
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.
-
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 Brighton Line
The BMT Brighton Line is a major New York City Subway route in Brooklyn that connects Brighton Beach and other southern neighborhoods to central Brooklyn and Manhattan.
-
E.
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.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: BMT lines Target entity description: BMT lines are a group of New York City Subway routes that originated with the former Brooklyn–Manhattan Transit Corporation and primarily serve Brooklyn and Manhattan.
-
A.
BMT Myrtle Avenue Line
The BMT Myrtle Avenue Line is a New York City Subway line in Brooklyn and Queens that primarily carries the M train along an elevated route.
-
B.
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.
-
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 Brighton Line
The BMT Brighton Line is a major New York City Subway route in Brooklyn that connects Brighton Beach and other southern neighborhoods to central Brooklyn and Manhattan.
-
E.
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.
- F. None of above. chosen
Statements (60)
| Predicate | Object |
|---|---|
| instanceOf |
former private transit division
ⓘ
group of New York City Subway services ⓘ |
| differentFrom |
IRT (A Division) lines
ⓘ
surface form:
IRT lines
|
| fareControlChange | brought under city ownership in 1940 ⓘ |
| hasBrooklynTrunk |
BMT Brighton Line
ⓘ
BMT Canarsie Line ⓘ BMT Culver Line (historical BMT operation) ⓘ
surface form:
BMT Culver Line (historical BMT portion)
BMT Fourth Avenue Line ⓘ BMT Jamaica Line ⓘ BMT Myrtle Avenue Line ⓘ
surface form:
BMT Myrtle Avenue Line (remaining elevated segment)
BMT Sea Beach Line ⓘ BMT West End Line ⓘ |
| hasMainManhattanTrunk |
BMT Broadway Line
ⓘ
BMT Nassau Street Line ⓘ |
| hasOrigin | Brooklyn–Manhattan Transit Corporation ⓘ |
| hasQueensTrunk |
BMT 60th Street Tunnel Connection
ⓘ
BMT 63rd Street Line connection ⓘ BMT Astoria Line ⓘ |
| hasSignColor |
bright orange for BMT Brighton via Sixth Avenue (B, Q variants historically)
ⓘ
brown for Nassau Street services historically ⓘ orange for Sixth Avenue services on former BMT routes ⓘ yellow for Broadway services ⓘ |
| historicalOperator |
Brooklyn Rapid Transit Company
ⓘ
Brooklyn–Manhattan Transit Corporation ⓘ |
| includesFormerService |
BMT 1 (Brighton Local) historical designation
ⓘ
BMT 14 (Canarsie Line) historical designation ⓘ BMT 15 (Fourth Avenue Local) historical designation ⓘ BMT 16 (Nassau Street Local) historical designation ⓘ BMT 2 (Brighton Express) historical designation ⓘ BMT 20 (Nassau Street Express) historical designation ⓘ BMT 2X (Brighton Express variant) historical designation ⓘ BMT 3 (West End Local) historical designation ⓘ BMT 4 (West End Express) historical designation ⓘ BMT 5 (Sea Beach Express) historical designation ⓘ |
| includesService |
Sixth Avenue express service
ⓘ
surface form:
B (Sixth Avenue Express)
D (Sixth Avenue Express) on former BMT routes ⓘ BMT Culver Line (historical BMT operation) ⓘ
surface form:
F (Culver Line segment historically BMT)
J (New York City Subway service) ⓘ
surface form:
J (Nassau Street Local)
M (Sixth Avenue Local) on former BMT routes ⓘ N Broadway Express ⓘ
surface form:
N (Broadway Express)
Second Avenue–Broadway Express ⓘ
surface form:
Q (Second Avenue/Broadway Express)
R (New York City Subway service) ⓘ
surface form:
R (Broadway Local)
W (Broadway Local) on weekdays ⓘ Z (Nassau Street Express) during rush hours ⓘ |
| integratedInto | unified New York City Subway system in 1940 ⓘ |
| operatedBy |
Metropolitan Transportation Authority
ⓘ
New York City Transit Authority ⓘ |
| partOf | New York City Subway ⓘ |
| previouslyUsedNumberDesignationsUntil | 1967 ⓘ |
| servesBorough |
Brooklyn
ⓘ
Manhattan ⓘ Queens ⓘ |
| sharesDivisionWith | IND lines ⓘ |
| usesCarLength | 60-foot or 75-foot cars ⓘ |
| usesCarWidth | 10-foot-wide cars ⓘ |
| usesDivision | B Division ⓘ |
| usesLetterDesignationsSince | 1967 ⓘ |
| usesPowerSupply | 600 V DC third rail ⓘ |
| usesRollingStockType | B Division rolling stock ⓘ |
| usesTrackGauge | standard gauge ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: BMT lines Description of subject: BMT lines are a group of New York City Subway routes that originated with the former Brooklyn–Manhattan Transit Corporation and primarily serve Brooklyn and Manhattan.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Brooklyn–Manhattan Transit Corporation lines
this entity surface form:
BMT trunk lines
this entity surface form:
BMT trains
this entity surface form:
BMT elevated system
this entity surface form:
BMT elevated services
this entity surface form:
B D F M subway lines