Triple

T21789778
Position Surface form Disambiguated ID Type / Status
Subject Caltrain stations E537938 entity
Predicate hasService P182 FINISHED
Object Baby Bullet express trains
Baby Bullet express trains are Caltrain’s limited-stop, high-speed commuter rail services designed to provide faster trips between key stations along the San Francisco Peninsula.
 E1502406 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: Baby Bullet express trains | Statement: [Caltrain stations, hasService, Baby Bullet express trains]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Baby Bullet express trains
Context triple: [Caltrain stations, hasService, Baby Bullet express trains]
  • A. XPT train
    The XPT train is a long-distance, high-speed diesel passenger train used in New South Wales, Australia, based on the British InterCity 125 design.
  • B. Lastochka trains
    Lastochka trains are modern Russian high-speed electric multiple units used for intercity and regional passenger services.
  • C. Super Rapid Train
    Super Rapid Train is a South Korean high-speed rail service brand that operates fast intercity trains on major national routes.
  • D. Voyager trains
    Voyager trains are a family of high-speed diesel-electric multiple unit passenger trains widely used on intercity services in the UK rail network.
  • E. Z train
    The Z train is a New York City Subway rush-hour, skip-stop service that runs along the J line in Brooklyn and Queens, providing limited-stop service between Jamaica Center and lower Manhattan.
  • 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: Baby Bullet express trains
Triple: [Caltrain stations, hasService, Baby Bullet express trains]
Generated description
Baby Bullet express trains are Caltrain’s limited-stop, high-speed commuter rail services designed to provide faster trips between key stations along the San Francisco Peninsula.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Baby Bullet express trains
Target entity description: Baby Bullet express trains are Caltrain’s limited-stop, high-speed commuter rail services designed to provide faster trips between key stations along the San Francisco Peninsula.
  • A. XPT train
    The XPT train is a long-distance, high-speed diesel passenger train used in New South Wales, Australia, based on the British InterCity 125 design.
  • B. Lastochka trains
    Lastochka trains are modern Russian high-speed electric multiple units used for intercity and regional passenger services.
  • C. Super Rapid Train
    Super Rapid Train is a South Korean high-speed rail service brand that operates fast intercity trains on major national routes.
  • D. Voyager trains
    Voyager trains are a family of high-speed diesel-electric multiple unit passenger trains widely used on intercity services in the UK rail network.
  • E. Z train
    The Z train is a New York City Subway rush-hour, skip-stop service that runs along the J line in Brooklyn and Queens, providing limited-stop service between Jamaica Center and lower Manhattan.
  • 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_69e0c47198f881908cb0d237266c10e9 completed April 16, 2026, 11:13 a.m.
NER Named-entity recognition batch_69f0621ed2b481909e3df17aee9cd8f7 completed April 28, 2026, 7:30 a.m.
NED1 Entity disambiguation (via context triple) batch_6a0a3e74f3b8819099c9b8565afb5e2e completed May 17, 2026, 10:17 p.m.
NEDg Description generation batch_6a0a401ceb748190a4718ea4bc7ece45 completed May 17, 2026, 10:24 p.m.
NED2 Entity disambiguation (via description) batch_6a0a40bc29fc8190b082a1f86b2c4907 completed May 17, 2026, 10:27 p.m.
Created at: April 16, 2026, 6:52 p.m.