Triple

T5676915
Position Surface form Disambiguated ID Type / Status
Subject E231 series EMU E125107 entity
Predicate usedOnLine P15252 FINISHED
Object Yamanote Line (E231-500, until replacement by E235)
The Yamanote Line (E231-500, until replacement by E235) refers to the era when Tokyo’s busy circular Yamanote Line was primarily operated by E231-500 series commuter EMU trains before they were superseded by the newer E235 series.
 E125107 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: Yamanote Line (E231-500, until replacement by E235) | Statement: [E231 series EMU, usedOnLine, Yamanote Line (E231-500, until replacement by E235)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Yamanote Line (E231-500, until replacement by E235)
Context triple: [E231 series EMU, usedOnLine, Yamanote Line (E231-500, until replacement by E235)]
  • A. Tokyu 5000 series
    The Tokyu 5000 series is a Japanese electric multiple unit train type operated by Tokyu Corporation, primarily used for commuter services in the Tokyo metropolitan area.
  • B. Tokyu 5050 series
    The Tokyu 5050 series is a Japanese electric multiple unit commuter train type operated by Tokyu Corporation and used on through-services with Tokyo Metro and other railway lines in the Tokyo area.
  • C. Tokyo Metro 7000 series
    The Tokyo Metro 7000 series is a Japanese electric multiple unit train type operated by Tokyo Metro, primarily used on busy commuter subway lines in Tokyo.
  • D. E231 series EMU
    The E231 series EMU is a widely used Japanese commuter train type operated by JR East, known for its high-capacity, rapid-transit service in the Greater Tokyo area.
  • E. E235 series EMU
    The E235 series EMU is a modern Japanese commuter train operated by JR East, notable for its advanced onboard information systems, energy-efficient design, and use on busy urban lines in the Tokyo area.
  • 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: Yamanote Line (E231-500, until replacement by E235)
Triple: [E231 series EMU, usedOnLine, Yamanote Line (E231-500, until replacement by E235)]
Generated description
The Yamanote Line (E231-500, until replacement by E235) refers to the era when Tokyo’s busy circular Yamanote Line was primarily operated by E231-500 series commuter EMU trains before they were superseded by the newer E235 series.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Yamanote Line (E231-500, until replacement by E235)
Target entity description: The Yamanote Line (E231-500, until replacement by E235) refers to the era when Tokyo’s busy circular Yamanote Line was primarily operated by E231-500 series commuter EMU trains before they were superseded by the newer E235 series.
  • A. Tokyu 5000 series
    The Tokyu 5000 series is a Japanese electric multiple unit train type operated by Tokyu Corporation, primarily used for commuter services in the Tokyo metropolitan area.
  • B. Tokyu 5050 series
    The Tokyu 5050 series is a Japanese electric multiple unit commuter train type operated by Tokyu Corporation and used on through-services with Tokyo Metro and other railway lines in the Tokyo area.
  • C. Tokyo Metro 7000 series
    The Tokyo Metro 7000 series is a Japanese electric multiple unit train type operated by Tokyo Metro, primarily used on busy commuter subway lines in Tokyo.
  • D. E231 series EMU chosen
    The E231 series EMU is a widely used Japanese commuter train type operated by JR East, known for its high-capacity, rapid-transit service in the Greater Tokyo area.
  • E. E235 series EMU
    The E235 series EMU is a modern Japanese commuter train operated by JR East, notable for its advanced onboard information systems, energy-efficient design, and use on busy urban lines in the Tokyo area.
  • F. None of above.

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_69c008295c808190acfe78915e7d656a completed March 22, 2026, 3:18 p.m.
NER Named-entity recognition batch_69c02392f9f481908f7b80873589eff1 completed March 22, 2026, 5:14 p.m.
NED1 Entity disambiguation (via context triple) batch_69c04dbbbe9081908d1915b898722c18 completed March 22, 2026, 8:14 p.m.
NEDg Description generation batch_69c04ee0ee6c81908f5959bdba54a7ec completed March 22, 2026, 8:19 p.m.
NED2 Entity disambiguation (via description) batch_69c04fb8ddfc8190a95b86972e659403 completed March 22, 2026, 8:23 p.m.
Created at: March 22, 2026, 3:43 p.m.