Triple
T22781066
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | WMATA 4000-series railcar |
E563836
|
entity |
| Predicate | operatedOn |
P2572
|
FINISHED |
| Object | Red Line |
—
|
NE NERFINISHED |
How this triple was built (3 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: Red Line | Statement: [WMATA 4000-series railcar, operatedOn, Red Line]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Red Line Context triple: [WMATA 4000-series railcar, operatedOn, Red Line]
-
A.
Red Line
The Red Line is a primary route of the MetroLink light rail system serving key destinations in the St. Louis metropolitan area.
-
B.
Red Line
Red Line is a song by the American rock band Trans Am, known for their experimental blend of post-rock, electronic, and krautrock influences.
-
C.
Red Line
The Red Line is one of the automated people-mover routes within San Francisco International Airport’s AirTrain system, connecting terminals and key airport facilities.
-
D.
Red Line
The Red Line is one of the primary light rail transit routes in Calgary’s CTrain system, running on a north–south axis through key areas of the city.
-
E.
Red Line
"Red Line" is a studio album by the American progressive rock band Trans Am, showcasing their blend of experimental rock, electronic, and post-rock influences.
- 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: Red Line Target entity description: The Red Line is a major Washington Metro rapid transit route serving key corridors through Washington, D.C. and its Maryland suburbs.
-
A.
Red Line
chosen
Red Line is a major rapid transit route in the Washington Metro system, running through key areas of Washington, D.C., and its Maryland suburbs.
-
B.
Red Line
The Red Line is a major rapid transit route in the Boston metropolitan area, operated by the MBTA and running primarily north–south through key neighborhoods and suburbs.
-
C.
Red Line
The Red Line is a major rapid transit route in Chicago that runs north–south through the city, serving as one of the busiest lines in its subway and elevated rail system.
-
D.
Red Line
The Red Line is a major rapid transit route serving Columbia, providing key north–south connections across the city.
-
E.
Red Line
The Red Line is a major light rail route in the Dallas Area Rapid Transit (DART) system serving key corridors across the Dallas–Fort Worth metro area.
- F. None of above.
Provenance (2 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_69e2455500788190b4b33030461f3bbd |
completed | April 17, 2026, 2:36 p.m. |
| NER | Named-entity recognition | batch_69f17c2cab0881908df1d0629b43d350 |
completed | April 29, 2026, 3:34 a.m. |
Created at: April 17, 2026, 3:28 p.m.