Triple

T11161505
Position Surface form Disambiguated ID Type / Status
Subject Tokyo Metro Marunouchi Line E264046 entity
Predicate rollingStock P1305 FINISHED
Object 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.
 E909228 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: Tokyo Metro 2000 series | Statement: [Tokyo Metro Marunouchi Line, rollingStock, Tokyo Metro 2000 series]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Tokyo Metro 2000 series
Context triple: [Tokyo Metro Marunouchi Line, rollingStock, Tokyo Metro 2000 series]
  • A. 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.
  • B. Tokyo Metro 10000 series
    The Tokyo Metro 10000 series is a fleet of modern electric multiple unit trains operated by Tokyo Metro, known for serving through-services on several interconnected subway and private railway lines in the Tokyo area.
  • C. Tokyo Metro 1000 series
    The Tokyo Metro 1000 series is a modern electric multiple unit train used on Tokyo’s subway system, designed with retro-inspired styling that pays homage to the original Ginza Line cars while incorporating contemporary technology and comfort features.
  • D. Tokyo Metro 17000 series
    The Tokyo Metro 17000 series is a modern electric multiple unit train operated by Tokyo Metro, designed for through-services on lines such as the Fukutoshin and Yurakucho Lines with improved energy efficiency and passenger comfort.
  • E. 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.
  • 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: Tokyo Metro 2000 series
Triple: [Tokyo Metro Marunouchi Line, rollingStock, Tokyo Metro 2000 series]
Generated description
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.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Tokyo Metro 2000 series
Target entity description: 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.
  • A. 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.
  • B. Tokyo Metro 10000 series
    The Tokyo Metro 10000 series is a fleet of modern electric multiple unit trains operated by Tokyo Metro, known for serving through-services on several interconnected subway and private railway lines in the Tokyo area.
  • C. Tokyo Metro 1000 series
    The Tokyo Metro 1000 series is a modern electric multiple unit train used on Tokyo’s subway system, designed with retro-inspired styling that pays homage to the original Ginza Line cars while incorporating contemporary technology and comfort features.
  • D. Tokyo Metro 17000 series
    The Tokyo Metro 17000 series is a modern electric multiple unit train operated by Tokyo Metro, designed for through-services on lines such as the Fukutoshin and Yurakucho Lines with improved energy efficiency and passenger comfort.
  • E. 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.
  • 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_69d6aa9ccddc8190868998c8b7beb060 completed April 8, 2026, 7:21 p.m.
NER Named-entity recognition batch_69d7e8817a90819087820d5241c58851 completed April 9, 2026, 5:57 p.m.
NED1 Entity disambiguation (via context triple) batch_69e46375c61c8190939401f790cf1593 completed April 19, 2026, 5:09 a.m.
NEDg Description generation batch_69e46c374ca08190a876ee68dea9b821 completed April 19, 2026, 5:46 a.m.
NED2 Entity disambiguation (via description) batch_69e4747bc02c81908f0782cf85667f3f completed April 19, 2026, 6:21 a.m.
Created at: April 8, 2026, 9:29 p.m.