Triple

T12120139
Position Surface form Disambiguated ID Type / Status
Subject Amagasaki derailment E288671 entity
Predicate trainType P1305 FINISHED
Object 207 series EMU
The 207 series EMU is a Japanese electric multiple unit commuter train type operated primarily in the Kansai region by JR West.
 E975422 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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: 207 series EMU | Statement: [Amagasaki derailment, trainType, 207 series EMU]

Disambiguation candidates (2 decisions)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: 207 series EMU
Context triple: [Amagasaki derailment, trainType, 207 series EMU]
  • A. 205 series EMU
    The 205 series EMU is a Japanese commuter electric multiple unit train type introduced by Japanese National Railways and widely used on busy urban and suburban lines, particularly around the Tokyo area.
  • B. 201 series EMU
    The 201 series EMU is a Japanese electric multiple unit train type introduced by Japanese National Railways in the late 1970s and used extensively on urban commuter lines such as those in the Osaka and Tokyo areas.
  • C. 289 series EMU
    The 289 series EMU is a Japanese electric multiple unit train type operated by JR West, primarily used for limited express services in the Kansai region.
  • D. 323 series EMU
    The 323 series EMU is a modern Japanese electric multiple unit train operated by JR West, introduced to provide improved comfort, efficiency, and accessibility on urban commuter services.
  • E. 287 series EMU
    The 287 series EMU is a Japanese electric multiple unit train operated by JR West, primarily used for limited express services in the Kansai region.
  • 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: 207 series EMU
Target entity description: The 207 series EMU is a Japanese electric multiple unit commuter train type operated primarily in the Kansai region by JR West.
  • A. 205 series EMU
    The 205 series EMU is a Japanese commuter electric multiple unit train type introduced by Japanese National Railways and widely used on busy urban and suburban lines, particularly around the Tokyo area.
  • B. 201 series EMU
    The 201 series EMU is a Japanese electric multiple unit train type introduced by Japanese National Railways in the late 1970s and used extensively on urban commuter lines such as those in the Osaka and Tokyo areas.
  • C. 289 series EMU
    The 289 series EMU is a Japanese electric multiple unit train type operated by JR West, primarily used for limited express services in the Kansai region.
  • D. 323 series EMU
    The 323 series EMU is a modern Japanese electric multiple unit train operated by JR West, introduced to provide improved comfort, efficiency, and accessibility on urban commuter services.
  • E. 287 series EMU
    The 287 series EMU is a Japanese electric multiple unit train operated by JR West, primarily used for limited express services in the Kansai region.
  • F. None of above. chosen

How the object was described

The object's one-sentence description was generated by prompting gpt-5.1 with the object name and this triple as context.

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: 207 series EMU
Triple: [Amagasaki derailment, trainType, 207 series EMU]
Generated description
The 207 series EMU is a Japanese electric multiple unit commuter train type operated primarily in the Kansai region by JR West.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69d6ab4b5e4c81909950b17151eb0951 elicitation completed
NER batch_69d91577a03c81909add7a5d7324a648 ner completed
NED1 batch_69f61e48957081909c4598e82ab31e1f ned_source_triple completed
NED2 batch_69f62009766c8190985fafe9ba53ae7b ned_description completed
NEDg batch_69f61f5b107c819082094791fcf7c5f4 nedg completed
Created at: April 8, 2026, 9:49 p.m.