Triple

T20600260
Position Surface form Disambiguated ID Type / Status
Subject Tokyu Setagaya Line E506158 entity
Predicate formerOperator P179 FINISHED
Object Tamaden (Tokyo Electric Railway) — NE NERFINISHED

How this triple was built (3 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: Tamaden (Tokyo Electric Railway) | Statement: [Tokyu Setagaya Line, formerOperator, Tamaden (Tokyo Electric Railway)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Tamaden (Tokyo Electric Railway)
Context triple: [Tokyu Setagaya Line, formerOperator, Tamaden (Tokyo Electric Railway)]
  • A. Toei Subway
    Toei Subway is one of Tokyo's two main subway networks, operated by the Tokyo Metropolitan Bureau of Transportation and serving numerous urban and suburban areas across the city.
  • B. Tama Toshi Monorail Co., Ltd.
    Tama Toshi Monorail Co., Ltd. is a Japanese transportation company that owns and operates the Tama Toshi Monorail Line serving the Tama area of western Tokyo.
  • C. Tobu Railway
    Tobu Railway is a major private railway company in Japan that operates extensive rail networks in the Greater Tokyo area and surrounding regions.
  • D. Keifuku Randen tram line
    The Keifuku Randen tram line is a historic streetcar route in Kyoto, Japan, known for connecting central Kyoto with the scenic Arashiyama area and offering a nostalgic, small-scale rail experience.
  • E. Tokyu Railways
    Tokyu Railways is a major private railway operator in the Greater Tokyo area of Japan, known for its extensive commuter rail network and integration with urban development projects.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Tamaden (Tokyo Electric Railway)
Target entity description: Tamaden (Tokyo Electric Railway) was a former private tram and railway operator in Tokyo that ran local streetcar and interurban lines before being absorbed into the Tokyu Corporation network.
  • A. Toei Subway
    Toei Subway is one of Tokyo's two main subway networks, operated by the Tokyo Metropolitan Bureau of Transportation and serving numerous urban and suburban areas across the city.
  • B. Tama Toshi Monorail Co., Ltd.
    Tama Toshi Monorail Co., Ltd. is a Japanese transportation company that owns and operates the Tama Toshi Monorail Line serving the Tama area of western Tokyo.
  • C. Tobu Railway
    Tobu Railway is a major private railway company in Japan that operates extensive rail networks in the Greater Tokyo area and surrounding regions.
  • D. Keifuku Randen tram line
    The Keifuku Randen tram line is a historic streetcar route in Kyoto, Japan, known for connecting central Kyoto with the scenic Arashiyama area and offering a nostalgic, small-scale rail experience.
  • E. Tokyu Railways chosen
    Tokyu Railways is a major private railway operator in the Greater Tokyo area of Japan, known for its extensive commuter rail network and integration with urban development projects.
  • F. None of above.

Provenance (2 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_69e0b4ba6ae88190af871e1f9522c704 completed April 16, 2026, 10:06 a.m.
NER Named-entity recognition batch_69e6aa1ef9ac8190b05e23c149529cb9 completed April 20, 2026, 10:35 p.m.
Created at: April 16, 2026, 11:41 a.m.