Triple
T17859209
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Washington Metro Silver Line |
E446020
|
entity |
| Predicate | maintenanceFacility |
P105
|
FINISHED |
| Object |
Dulles Rail Yard
Dulles Rail Yard is a rail maintenance and storage facility serving trains on the Washington Metro’s Silver Line near Washington Dulles International Airport.
|
E1294443
|
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: 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.
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: Dulles Rail Yard Triple: [Washington Metro Silver Line, maintenanceFacility, Dulles Rail Yard]
Generated 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.
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 (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_69d8b9f26f18819089c9e43250bee6ae |
completed | April 10, 2026, 8:50 a.m. |
| NER | Named-entity recognition | batch_69e4978e68ec8190a4306f7b7bb058d7 |
completed | April 19, 2026, 8:51 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_6a0313ca5bac819089bedd1ee1b0546a |
completed | May 12, 2026, 11:49 a.m. |
| NEDg | Description generation | batch_6a0314f1f01c8190b4065637716e845f |
completed | May 12, 2026, 11:54 a.m. |
| NED2 | Entity disambiguation (via description) | batch_6a0318a4ca1481909f8ec14b9b8cb422 |
completed | May 12, 2026, 12:10 p.m. |
Created at: April 10, 2026, 10:17 a.m.