Triple

T1360094
Position Surface form Disambiguated ID Type / Status
Subject Nagatachō E29078 entity
Predicate servedBy P82 FINISHED
Object Tokyo Metro Marunouchi Line
The Tokyo Metro Marunouchi Line is one of Tokyo’s main subway lines, running in a loop-like route through central districts and connecting major hubs such as Shinjuku, Tokyo, and Ikebukuro.
 E264046 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 Marunouchi Line | Statement: [Nagatachō, servedBy, Tokyo Metro Marunouchi Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Tokyo Metro Marunouchi Line
Context triple: [Nagatachō, servedBy, Tokyo Metro Marunouchi Line]
  • A. Tokyo Metro Yurakuchō Line
    The Tokyo Metro Yurakuchō Line is a major Tokyo subway line running east–west across the city, connecting central business districts with residential areas and key transit hubs.
  • B. Tokyo Metro Hanzomon Line
    The Tokyo Metro Hanzomon Line is a major Tokyo subway line that runs east–west across the city center, linking Shibuya with key business and residential districts and offering through services onto private railway lines.
  • C. Tokyo Metro Fukutoshin Line
    The Tokyo Metro Fukutoshin Line is a major Tokyo subway line running north–south through central and suburban areas, connecting key hubs such as Shibuya with other important districts.
  • D. Tokyo Metro Chiyoda Line
    The Tokyo Metro Chiyoda Line is a major Tokyo subway line running north–south through central districts and into suburban areas, connecting key hubs such as Omotesando, Otemachi, and Yoyogi-Uehara.
  • E. Tokyo Metro Hibiya Line
    The Tokyo Metro Hibiya Line is a major Tokyo subway line running through central districts such as Chiyoda, Minato, and Taito, providing key commuter and interline connections across the city.
  • 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 Marunouchi Line
Triple: [Nagatachō, servedBy, Tokyo Metro Marunouchi Line]
Generated description
The Tokyo Metro Marunouchi Line is one of Tokyo’s main subway lines, running in a loop-like route through central districts and connecting major hubs such as Shinjuku, Tokyo, and Ikebukuro.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Tokyo Metro Marunouchi Line
Target entity description: The Tokyo Metro Marunouchi Line is one of Tokyo’s main subway lines, running in a loop-like route through central districts and connecting major hubs such as Shinjuku, Tokyo, and Ikebukuro.
  • A. Tokyo Metro Yurakuchō Line
    The Tokyo Metro Yurakuchō Line is a major Tokyo subway line running east–west across the city, connecting central business districts with residential areas and key transit hubs.
  • B. Tokyo Metro Hanzomon Line
    The Tokyo Metro Hanzomon Line is a major Tokyo subway line that runs east–west across the city center, linking Shibuya with key business and residential districts and offering through services onto private railway lines.
  • C. Tokyo Metro Fukutoshin Line
    The Tokyo Metro Fukutoshin Line is a major Tokyo subway line running north–south through central and suburban areas, connecting key hubs such as Shibuya with other important districts.
  • D. Tokyo Metro Chiyoda Line
    The Tokyo Metro Chiyoda Line is a major Tokyo subway line running north–south through central districts and into suburban areas, connecting key hubs such as Omotesando, Otemachi, and Yoyogi-Uehara.
  • E. Tokyo Metro Hibiya Line
    The Tokyo Metro Hibiya Line is a major Tokyo subway line running through central districts such as Chiyoda, Minato, and Taito, providing key commuter and interline connections across the city.
  • 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_69a498d77abc8190913bf57e5f51d2c4 completed March 1, 2026, 7:51 p.m.
NER Named-entity recognition batch_69a4c2b156b081909c99ada70a969fc0 completed March 1, 2026, 10:50 p.m.
NED1 Entity disambiguation (via context triple) batch_69aeb39f627c8190b9961cfeb4b257ca completed March 9, 2026, 11:48 a.m.
NEDg Description generation batch_69aeb41b815881908622ef49e6817629 completed March 9, 2026, 11:50 a.m.
NED2 Entity disambiguation (via description) batch_69aeb58e033c8190afc79f964ba203c4 completed March 9, 2026, 11:57 a.m.
Created at: March 1, 2026, 7:56 p.m.