Triple

T500529
Position Surface form Disambiguated ID Type / Status
Subject Fredericksburg Line E10388 entity
Predicate interchangesWith P3495 FINISHED
Object Washington Metro at Union Station
Washington Metro at Union Station is a major rapid transit hub in Washington, D.C., connecting multiple Metro lines with Amtrak, commuter rail, and intercity bus services.
E63426 NE FINISHED

How this triple was built (5 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: Washington Metro at Union Station | Statement: [Fredericksburg Line, interchangesWith, Washington Metro at Union Station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Washington Metro at Union Station
Context triple: [Fredericksburg Line, interchangesWith, Washington Metro at Union Station]
  • A. Crystal City station (Washington Metro)
    Crystal City station (Washington Metro) is an underground rapid transit station in Arlington, Virginia, serving the Blue and Yellow Lines and providing access to the Crystal City business district near Reagan National Airport.
  • B. Washington Metro
    Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
  • C. Arlington station
    Arlington station is an underground light rail stop on Boston's MBTA Green Line located near the Back Bay and Boston Public Garden.
  • D. Federal Triangle station
    Federal Triangle station is a Washington Metro rapid transit station located in downtown Washington, D.C., serving the Blue, Orange, and Silver lines near key federal buildings and the National Mall.
  • E. Dupont Circle station
    Dupont Circle station is a Washington, D.C. Metro station on the Red Line serving the Dupont Circle neighborhood and nearby areas such as Kalorama.
  • 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: Washington Metro at Union Station
Triple: [Fredericksburg Line, interchangesWith, Washington Metro at Union Station]
Generated description
Washington Metro at Union Station is a major rapid transit hub in Washington, D.C., connecting multiple Metro lines with Amtrak, commuter rail, and intercity bus services.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Washington Metro at Union Station
Target entity description: Washington Metro at Union Station is a major rapid transit hub in Washington, D.C., connecting multiple Metro lines with Amtrak, commuter rail, and intercity bus services.
  • A. Crystal City station (Washington Metro)
    Crystal City station (Washington Metro) is an underground rapid transit station in Arlington, Virginia, serving the Blue and Yellow Lines and providing access to the Crystal City business district near Reagan National Airport.
  • B. Washington Metro
    Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
  • C. Arlington station
    Arlington station is an underground light rail stop on Boston's MBTA Green Line located near the Back Bay and Boston Public Garden.
  • D. Federal Triangle station
    Federal Triangle station is a Washington Metro rapid transit station located in downtown Washington, D.C., serving the Blue, Orange, and Silver lines near key federal buildings and the National Mall.
  • E. Dupont Circle station
    Dupont Circle station is a Washington, D.C. Metro station on the Red Line serving the Dupont Circle neighborhood and nearby areas such as Kalorama.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: interchangesWith
Context triple: [Fredericksburg Line, interchangesWith, Washington Metro at Union Station]
  • A. crossWith
    Indicates that one entity intersects or passes over/through the path, boundary, or position of another entity.
  • B. hasNotableInterchange chosen
    Indicates that there exists a significant or well-known point of exchange, connection, or transfer between the related entities.
  • C. crossesBetween
    Indicates that one entity passes from one side of a second entity to the other, traversing the space between two reference points or boundaries associated with that second entity.
  • D. crossedBy
    Indicates that one entity (typically a path, line, or boundary) is intersected or traversed by another entity.
  • E. hasBusInterchange
    Indicates that one transport-related entity includes, contains, or is associated with a bus interchange facility.
  • F. None of above.

Provenance (6 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_69a2e847df8481909239ec08ccf1e376 completed Feb. 28, 2026, 1:06 p.m.
NER Named-entity recognition batch_69a2f13096248190a622a58dcf540b00 completed Feb. 28, 2026, 1:44 p.m.
NED1 Entity disambiguation (via context triple) batch_69a4984d3a4881909b4bec4c9b7dcd03 completed March 1, 2026, 7:49 p.m.
NEDg Description generation batch_69a49c5d940c8190802f51ddd722913d completed March 1, 2026, 8:06 p.m.
NED2 Entity disambiguation (via description) batch_69a49dc00084819088f75c7ff9d93f94 completed March 1, 2026, 8:12 p.m.
PD Predicate disambiguation batch_69a2edfbb7e0819092cf29c2c68fe8fb completed Feb. 28, 2026, 1:30 p.m.
Created at: Feb. 28, 2026, 1:12 p.m.