Triple

T8302857
Position Surface form Disambiguated ID Type / Status
Subject SkyTrain Expo Line E194386 entity
Predicate rollingStock P1305 FINISHED
Object Mark II SkyTrain cars
Mark II SkyTrain cars are a generation of automated, driverless rapid transit vehicles used on Vancouver’s SkyTrain system, featuring articulated, higher-capacity design for urban metro service.
 E725015 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: Mark II SkyTrain cars | Statement: [SkyTrain Expo Line, rollingStock, Mark II SkyTrain cars]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Mark II SkyTrain cars
Context triple: [SkyTrain Expo Line, rollingStock, Mark II SkyTrain cars]
  • A. Mark I SkyTrain cars
    Mark I SkyTrain cars are the original generation of automated, driverless rapid transit vehicles used on Vancouver’s SkyTrain system.
  • B. CTA 7000-series railcars
    The CTA 7000-series railcars are a modern generation of Chicago Transit Authority rapid transit vehicles designed to replace older fleets with improved performance, accessibility, and passenger amenities.
  • C. CTA 2200-series railcars
    The CTA 2200-series railcars were a fleet of Chicago 'L' rapid transit cars built in the late 1960s, notable for their fluted stainless-steel sides and “blinker” door configuration, which served the system for several decades before retirement.
  • D. CTA 5000-series railcars
    The CTA 5000-series railcars are a modern generation of Chicago "L" rapid transit cars featuring improved accessibility, digital signage, and enhanced passenger comfort and safety systems.
  • E. Bombardier Flexity Freedom LRVs
    Bombardier Flexity Freedom LRVs are a class of modern low-floor light rail vehicles designed by Bombardier for urban transit systems in North America.
  • 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: Mark II SkyTrain cars
Triple: [SkyTrain Expo Line, rollingStock, Mark II SkyTrain cars]
Generated description
Mark II SkyTrain cars are a generation of automated, driverless rapid transit vehicles used on Vancouver’s SkyTrain system, featuring articulated, higher-capacity design for urban metro service.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Mark II SkyTrain cars
Target entity description: Mark II SkyTrain cars are a generation of automated, driverless rapid transit vehicles used on Vancouver’s SkyTrain system, featuring articulated, higher-capacity design for urban metro service.
  • A. Mark I SkyTrain cars
    Mark I SkyTrain cars are the original generation of automated, driverless rapid transit vehicles used on Vancouver’s SkyTrain system.
  • B. CTA 7000-series railcars
    The CTA 7000-series railcars are a modern generation of Chicago Transit Authority rapid transit vehicles designed to replace older fleets with improved performance, accessibility, and passenger amenities.
  • C. CTA 2200-series railcars
    The CTA 2200-series railcars were a fleet of Chicago 'L' rapid transit cars built in the late 1960s, notable for their fluted stainless-steel sides and “blinker” door configuration, which served the system for several decades before retirement.
  • D. CTA 5000-series railcars
    The CTA 5000-series railcars are a modern generation of Chicago "L" rapid transit cars featuring improved accessibility, digital signage, and enhanced passenger comfort and safety systems.
  • E. Bombardier Flexity Freedom LRVs
    Bombardier Flexity Freedom LRVs are a class of modern low-floor light rail vehicles designed by Bombardier for urban transit systems in North America.
  • 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_69ca82e613e88190bf8139669bbd0d53 completed March 30, 2026, 2:04 p.m.
NER Named-entity recognition batch_69cb7e8a45348190a7895b33abcb64c9 completed March 31, 2026, 7:58 a.m.
NED1 Entity disambiguation (via context triple) batch_69cd953b5fd881909696eb2647dc5f92 completed April 1, 2026, 9:59 p.m.
NEDg Description generation batch_69cda62070888190b55b3f54d29e28e7 completed April 1, 2026, 11:11 p.m.
NED2 Entity disambiguation (via description) batch_69cdb21a65d88190a19dd41f95d173c8 completed April 2, 2026, 12:02 a.m.
Created at: March 30, 2026, 5:53 p.m.