QJ train
E481015
The QJ train was a former New York City Subway service that operated in Brooklyn and Queens, primarily running along the Jamaica and Broadway–Brooklyn lines before being discontinued in the 1970s.
All labels observed (1)
| Label | Occurrences |
|---|---|
| QJ train canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4935515 — 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: QJ train Context triple: [BMT Myrtle Avenue Line, formerService, QJ train]
-
A.
Z train
The Z train is a New York City Subway rush-hour, skip-stop service that runs along the J line in Brooklyn and Queens, providing limited-stop service between Jamaica Center and lower Manhattan.
-
B.
XPT train
The XPT train is a long-distance, high-speed diesel passenger train used in New South Wales, Australia, based on the British InterCity 125 design.
-
C.
Q train
The Q train is a New York City Subway service that runs along the BMT Broadway Line in Manhattan and the Brighton Line in Brooklyn, connecting neighborhoods like Astoria, Midtown, and Coney Island.
-
D.
MX3000 train
The MX3000 train is a modern electric multiple unit used as the primary passenger rolling stock on the Oslo Metro system in Norway.
-
E.
DT3 train
The DT3 train is a type of electric multiple unit specifically designed for and operated on the Nuremberg U-Bahn rapid transit system in Germany.
- 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: QJ train Target entity description: The QJ train was a former New York City Subway service that operated in Brooklyn and Queens, primarily running along the Jamaica and Broadway–Brooklyn lines before being discontinued in the 1970s.
-
A.
Z train
The Z train is a New York City Subway rush-hour, skip-stop service that runs along the J line in Brooklyn and Queens, providing limited-stop service between Jamaica Center and lower Manhattan.
-
B.
XPT train
The XPT train is a long-distance, high-speed diesel passenger train used in New South Wales, Australia, based on the British InterCity 125 design.
-
C.
Q train
The Q train is a New York City Subway service that runs along the BMT Broadway Line in Manhattan and the Brighton Line in Brooklyn, connecting neighborhoods like Astoria, Midtown, and Coney Island.
-
D.
MX3000 train
The MX3000 train is a modern electric multiple unit used as the primary passenger rolling stock on the Oslo Metro system in Norway.
-
E.
DT3 train
The DT3 train is a type of electric multiple unit specifically designed for and operated on the Nuremberg U-Bahn rapid transit system in Germany.
- F. None of above. chosen
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf |
defunct rapid transit service
ⓘ
former New York City Subway service ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| discontinuedInDecade | 1970s ⓘ |
| discontinuedOn | 1973-01-02 ⓘ |
| fareControl | IND/BMT unified fare system NERFINISHED ⓘ |
| network | New York City Subway NERFINISHED ⓘ |
| networkRole | Jamaica Line trunk service ⓘ |
| operatedAfter | 1967 Chrystie Street Connection opening ⓘ |
| operatedBefore | 1979 subway route color reorganization ⓘ |
| operatedBy | New York City Transit Authority NERFINISHED ⓘ |
| operatedInBorough |
Brooklyn
NERFINISHED
ⓘ
Queens NERFINISHED ⓘ |
| operatedInCity | New York City NERFINISHED ⓘ |
| operatedOnInfrastructure |
BMT elevated structures
ⓘ
subway tunnels ⓘ |
| operatedUnderAgency | Metropolitan Transportation Authority NERFINISHED ⓘ |
| powerSupply | third rail 600 V DC ⓘ |
| railGauge | standard gauge ⓘ |
| replacedByService |
J train
NERFINISHED
ⓘ
M train NERFINISHED ⓘ |
| servedBoroughPair | Brooklyn–Queens NERFINISHED ⓘ |
| servedCorridor |
Broadway–Brooklyn corridor
NERFINISHED
ⓘ
Jamaica Line corridor NERFINISHED ⓘ |
| servedLine |
BMT Broadway Line (Brooklyn)
NERFINISHED
ⓘ
BMT Broadway–Brooklyn Line NERFINISHED ⓘ BMT Jamaica Line NERFINISHED ⓘ |
| serviceClass | lettered route ⓘ |
| serviceColorEra | pre-1979 color-coding ⓘ |
| serviceLetter | QJ NERFINISHED ⓘ |
| servicePattern | Brooklyn–Queens through service ⓘ |
| serviceType |
local service
ⓘ
rush-hour service ⓘ |
| status | discontinued ⓘ |
| successorDesignation |
J
ⓘ
M ⓘ |
| tractionType | electric multiple unit ⓘ |
| usedDivision | BMT Division NERFINISHED ⓘ |
| usedSystem | B Division (New York City Subway) NERFINISHED ⓘ |
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: QJ train Description of subject: The QJ train was a former New York City Subway service that operated in Brooklyn and Queens, primarily running along the Jamaica and Broadway–Brooklyn lines before being discontinued in the 1970s.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.