Triple

T2741877
Position Surface form Disambiguated ID Type / Status
Subject Union Station (Toronto) E60768 entity
Predicate railServicesOperator P20222 FINISHED
Object Amtrak
Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country and into parts of Canada.
 E1072 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: Amtrak | Statement: [Union Station (Toronto), railServicesOperator, Amtrak]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Amtrak
Context triple: [Union Station (Toronto), railServicesOperator, Amtrak]
  • A. Amtrak
    Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country.
  • B. Amtrak California
    Amtrak California is a state-supported intercity passenger rail program in California that oversees and brands several regional Amtrak routes, including the Capitol Corridor, San Joaquins, and Pacific Surfliner.
  • C. Amtrak Thruway Motorcoach
    Amtrak Thruway Motorcoach is a network of intercity bus services that connect communities without rail stations to Amtrak’s passenger train system across various regions in the United States.
  • D. Amtrak Keystone Service
    Amtrak Keystone Service is a passenger rail service operated by Amtrak that runs primarily between New York City and Harrisburg, Pennsylvania, providing frequent regional connections along the Keystone Corridor.
  • E. Amtrak Heartland Flyer
    The Amtrak Heartland Flyer is a daily passenger train route that operates between Oklahoma City, Oklahoma, and Fort Worth, Texas, providing regional rail service through the Southern Plains.
  • 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: Amtrak
Triple: [Union Station (Toronto), railServicesOperator, Amtrak]
Generated description
Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country and into parts of Canada.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Amtrak
Target entity description: Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country and into parts of Canada.
  • A. Amtrak chosen
    Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country.
  • B. Amtrak California
    Amtrak California is a state-supported intercity passenger rail program in California that oversees and brands several regional Amtrak routes, including the Capitol Corridor, San Joaquins, and Pacific Surfliner.
  • C. Amtrak Thruway Motorcoach
    Amtrak Thruway Motorcoach is a network of intercity bus services that connect communities without rail stations to Amtrak’s passenger train system across various regions in the United States.
  • D. Amtrak Keystone Service
    Amtrak Keystone Service is a passenger rail service operated by Amtrak that runs primarily between New York City and Harrisburg, Pennsylvania, providing frequent regional connections along the Keystone Corridor.
  • E. Amtrak Heartland Flyer
    The Amtrak Heartland Flyer is a daily passenger train route that operates between Oklahoma City, Oklahoma, and Fort Worth, Texas, providing regional rail service through the Southern Plains.
  • F. None of above.

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_69ab4b77febc819095603eb012cd141b completed March 6, 2026, 9:47 p.m.
NER Named-entity recognition batch_69abdb303898819098a7d192e29817f8 completed March 7, 2026, 8 a.m.
NED1 Entity disambiguation (via context triple) batch_69b01d466d6481908ca5952db369c9f3 completed March 10, 2026, 1:31 p.m.
NEDg Description generation batch_69b01def4f408190a0fcdba125b642bc completed March 10, 2026, 1:34 p.m.
NED2 Entity disambiguation (via description) batch_69b01e75d3c4819097fd86902eccd8c4 completed March 10, 2026, 1:36 p.m.
Created at: March 6, 2026, 9:56 p.m.