Triple

T11831837
Position Surface form Disambiguated ID Type / Status
Subject Sendai Subway E281409 entity
Predicate hasRollingStock P1305 FINISHED
Object Sendai Subway 2000 series
The Sendai Subway 2000 series is a type of electric multiple unit train used on the Sendai Subway system in Sendai, Japan.
 E952177 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: Sendai Subway 2000 series | Statement: [Sendai Subway, hasRollingStock, Sendai Subway 2000 series]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Sendai Subway 2000 series
Context triple: [Sendai Subway, hasRollingStock, Sendai Subway 2000 series]
  • A. Sendai Subway 1000 series
    The Sendai Subway 1000 series is an electric multiple unit train type operated on the Sendai Subway Namboku Line in Sendai, Japan.
  • B. Tokyo Metro 2000 series
    The Tokyo Metro 2000 series is a modern electric multiple unit train used on Tokyo’s subway network, featuring energy-efficient systems and updated passenger amenities.
  • C. Tokyo Metro 16000 series
    The Tokyo Metro 16000 series is a modern electric multiple unit train type operated by Tokyo Metro, primarily used for commuter services on the Chiyoda Line.
  • D. Tokyo Metro 18000 series
    The Tokyo Metro 18000 series is a modern electric multiple unit train operated by Tokyo Metro, designed for through-services on lines such as the Hanzomon Line and connecting suburban routes.
  • E. Tokyo Metro 9000 series
    The Tokyo Metro 9000 series is a fleet of electric multiple unit trains operated by Tokyo Metro, primarily known for serving the Namboku Line with modern, air-conditioned commuter services.
  • 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: Sendai Subway 2000 series
Triple: [Sendai Subway, hasRollingStock, Sendai Subway 2000 series]
Generated description
The Sendai Subway 2000 series is a type of electric multiple unit train used on the Sendai Subway system in Sendai, Japan.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Sendai Subway 2000 series
Target entity description: The Sendai Subway 2000 series is a type of electric multiple unit train used on the Sendai Subway system in Sendai, Japan.
  • A. Sendai Subway 1000 series
    The Sendai Subway 1000 series is an electric multiple unit train type operated on the Sendai Subway Namboku Line in Sendai, Japan.
  • B. Tokyo Metro 2000 series
    The Tokyo Metro 2000 series is a modern electric multiple unit train used on Tokyo’s subway network, featuring energy-efficient systems and updated passenger amenities.
  • C. Tokyo Metro 16000 series
    The Tokyo Metro 16000 series is a modern electric multiple unit train type operated by Tokyo Metro, primarily used for commuter services on the Chiyoda Line.
  • D. Tokyo Metro 18000 series
    The Tokyo Metro 18000 series is a modern electric multiple unit train operated by Tokyo Metro, designed for through-services on lines such as the Hanzomon Line and connecting suburban routes.
  • E. Tokyo Metro 9000 series
    The Tokyo Metro 9000 series is a fleet of electric multiple unit trains operated by Tokyo Metro, primarily known for serving the Namboku Line with modern, air-conditioned commuter services.
  • 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_69d6ab276f8c8190b1966a0ef11349ac completed April 8, 2026, 7:23 p.m.
NER Named-entity recognition batch_69d8a62c95988190a45dbaa7001c8846 completed April 10, 2026, 7:26 a.m.
NED1 Entity disambiguation (via context triple) batch_69f2812007dc81908e56fd47b2a94836 completed April 29, 2026, 10:07 p.m.
NEDg Description generation batch_69f40b2d0a388190a11a0e2d806e310b completed May 1, 2026, 2:08 a.m.
NED2 Entity disambiguation (via description) batch_69f40deb4eec8190a8fe1aa59b1514e6 completed May 1, 2026, 2:20 a.m.
Created at: April 8, 2026, 9:43 p.m.