Triple

T1003247
Position Surface form Disambiguated ID Type / Status
Subject Coast Starlight E21649 entity
Predicate railLineUsed P15040 FINISHED
Object BNSF Seattle Subdivision (segments)
BNSF Seattle Subdivision (segments) refers to portions of BNSF Railway’s mainline trackage in the Seattle area that are used by intercity passenger and freight trains.
E117841 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: BNSF Seattle Subdivision (segments) | Statement: [Coast Starlight, railLineUsed, BNSF Seattle Subdivision (segments)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: BNSF Seattle Subdivision (segments)
Context triple: [Coast Starlight, railLineUsed, BNSF Seattle Subdivision (segments)]
  • A. CSX RF&P Subdivision
    The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
  • B. Metra BNSF Railway Line
    The Metra BNSF Railway Line is a major Chicago-area commuter rail route running between Chicago Union Station and Aurora, Illinois, primarily along tracks owned by BNSF Railway.
  • C. Burlington Northern Santa Fe Railway main line
    The Burlington Northern Santa Fe Railway main line is a major transcontinental freight rail corridor in the United States that carries heavy rail traffic across key western routes, including the desert region near Needles, California.
  • D. Empire Corridor
    The Empire Corridor is a major passenger rail route in New York State, running from New York City through the Hudson Valley and up to cities such as Albany and Buffalo.
  • E. Northern Pacific
    The Northern Pacific is the northern portion of the Pacific Ocean, encompassing vast open waters and numerous island groups and archipelagos across the Northern Hemisphere.
  • 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: BNSF Seattle Subdivision (segments)
Triple: [Coast Starlight, railLineUsed, BNSF Seattle Subdivision (segments)]
Generated description
BNSF Seattle Subdivision (segments) refers to portions of BNSF Railway’s mainline trackage in the Seattle area that are used by intercity passenger and freight trains.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: BNSF Seattle Subdivision (segments)
Target entity description: BNSF Seattle Subdivision (segments) refers to portions of BNSF Railway’s mainline trackage in the Seattle area that are used by intercity passenger and freight trains.
  • A. CSX RF&P Subdivision
    The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
  • B. Metra BNSF Railway Line
    The Metra BNSF Railway Line is a major Chicago-area commuter rail route running between Chicago Union Station and Aurora, Illinois, primarily along tracks owned by BNSF Railway.
  • C. Burlington Northern Santa Fe Railway main line
    The Burlington Northern Santa Fe Railway main line is a major transcontinental freight rail corridor in the United States that carries heavy rail traffic across key western routes, including the desert region near Needles, California.
  • D. Empire Corridor
    The Empire Corridor is a major passenger rail route in New York State, running from New York City through the Hudson Valley and up to cities such as Albany and Buffalo.
  • E. Northern Pacific
    The Northern Pacific is the northern portion of the Pacific Ocean, encompassing vast open waters and numerous island groups and archipelagos across the Northern Hemisphere.
  • 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_69a493c53e648190ae8cb76c433fd9a7 completed March 1, 2026, 7:30 p.m.
NER Named-entity recognition batch_69a4b7570b388190ada9693935792a58 completed March 1, 2026, 10:01 p.m.
NED1 Entity disambiguation (via context triple) batch_69ac2a1ecddc8190b954d16c6e269498 completed March 7, 2026, 1:37 p.m.
NEDg Description generation batch_69ac2a8dd818819088e6140e9a12594b completed March 7, 2026, 1:39 p.m.
NED2 Entity disambiguation (via description) batch_69ac2af2efd88190b1da673aa3ead5fd completed March 7, 2026, 1:41 p.m.
Created at: March 1, 2026, 7:41 p.m.