Triple

T14572931
Position Surface form Disambiguated ID Type / Status
Subject Sōbu Line E341964 entity
Predicate usesRollingStock P5426 FINISHED
Object E257 series
The E257 series is a Japanese electric multiple unit train type operated by JR East, primarily used for limited express passenger services.
 E1114611 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: E257 series | Statement: [Sōbu Line, usesRollingStock, E257 series]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: E257 series
Context triple: [Sōbu Line, usesRollingStock, E257 series]
  • A. E259 series EMU
    The E259 series EMU is a Japanese electric multiple unit train operated by JR East, primarily used for limited express airport services such as the Narita Express.
  • B. E217 series
    The E217 series is a Japanese electric multiple unit train type that operated primarily on JR East’s Yokosuka and Sobu Line services from the mid-1990s until its phased retirement.
  • C. 225 series EMU
    The 225 series EMU is a modern Japanese electric multiple unit train operated by JR West, designed for commuter and suburban services with enhanced safety and comfort features.
  • D. E131 series
    The E131 series is a modern Japanese electric multiple unit train type operated by JR East for suburban and regional passenger services.
  • 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: E257 series
Triple: [Sōbu Line, usesRollingStock, E257 series]
Generated description
The E257 series is a Japanese electric multiple unit train type operated by JR East, primarily used for limited express passenger services.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: E257 series
Target entity description: The E257 series is a Japanese electric multiple unit train type operated by JR East, primarily used for limited express passenger services.
  • A. E259 series EMU
    The E259 series EMU is a Japanese electric multiple unit train operated by JR East, primarily used for limited express airport services such as the Narita Express.
  • B. E217 series
    The E217 series is a Japanese electric multiple unit train type that operated primarily on JR East’s Yokosuka and Sobu Line services from the mid-1990s until its phased retirement.
  • C. 225 series EMU
    The 225 series EMU is a modern Japanese electric multiple unit train operated by JR West, designed for commuter and suburban services with enhanced safety and comfort features.
  • D. E131 series
    The E131 series is a modern Japanese electric multiple unit train type operated by JR East for suburban and regional passenger services.
  • 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

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_69d822dcc6248190bed689984bceb0e2 completed April 9, 2026, 10:06 p.m.
NER Named-entity recognition batch_69deb3f33b1c8190bb447788bfd28d51 completed April 14, 2026, 9:38 p.m.
NED1 Entity disambiguation (via context triple) batch_69fde16830c0819090a97b073c8e642d completed May 8, 2026, 1:13 p.m.
NEDg Description generation batch_69fdebe3cb908190a0731bc2b87a7db8 completed May 8, 2026, 1:57 p.m.
NED2 Entity disambiguation (via description) batch_69fdec35ff7881908e2fece02dc531ef completed May 8, 2026, 1:59 p.m.
Created at: April 10, 2026, 1:24 a.m.