Triple
T17859209
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Washington Metro Silver Line |
E446020
|
entity |
| Predicate | maintenanceFacility |
P105
|
FINISHED |
| Object | Dulles Rail Yard |
—
|
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: Dulles Rail Yard | Statement: [Washington Metro Silver Line, maintenanceFacility, Dulles Rail Yard]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Dulles Rail Yard Context triple: [Washington Metro Silver Line, maintenanceFacility, Dulles Rail Yard]
-
A.
Herndon station
Herndon station is a Washington Metro rail station in Herndon, Virginia, on the Silver Line serving the Dulles Technology Corridor and surrounding suburbs.
-
B.
Herndon Depot
Herndon Depot is a historic former railroad station in Herndon, Virginia, now preserved as a landmark and local history site.
-
C.
Dulles North Transit Center
Dulles North Transit Center is a major park-and-ride and bus transit hub in Loudoun County, Virginia, providing commuter connections to the Washington, D.C. metropolitan area.
-
D.
Lorton station
Lorton station is the northern terminus of Amtrak’s Auto Train service, located in Lorton, Virginia.
-
E.
Pentagon City station
Pentagon City station is a Washington Metro rapid transit stop in Arlington, Virginia, serving the Pentagon City neighborhood and its adjacent shopping and office complexes.
- 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: Dulles Rail Yard Target entity description: Dulles Rail Yard is a rail maintenance and storage facility serving trains on the Washington Metro’s Silver Line near Washington Dulles International Airport.
-
A.
Herndon station
Herndon station is a Washington Metro rail station in Herndon, Virginia, on the Silver Line serving the Dulles Technology Corridor and surrounding suburbs.
-
B.
Herndon Depot
Herndon Depot is a historic former railroad station in Herndon, Virginia, now preserved as a landmark and local history site.
-
C.
Dulles North Transit Center
Dulles North Transit Center is a major park-and-ride and bus transit hub in Loudoun County, Virginia, providing commuter connections to the Washington, D.C. metropolitan area.
-
D.
Lorton station
Lorton station is the northern terminus of Amtrak’s Auto Train service, located in Lorton, Virginia.
-
E.
Pentagon City station
Pentagon City station is a Washington Metro rapid transit stop in Arlington, Virginia, serving the Pentagon City neighborhood and its adjacent shopping and office complexes.
- F. None of above. chosen
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_69d8b9f26f18819089c9e43250bee6ae |
completed | April 10, 2026, 8:50 a.m. |
| NER | Named-entity recognition | batch_69e4978e68ec8190a4306f7b7bb058d7 |
completed | April 19, 2026, 8:51 a.m. |
Created at: April 10, 2026, 10:17 a.m.