Triple

T12049604
Position Surface form Disambiguated ID Type / Status
Subject Keio Line E286879 entity
Predicate usesRollingStock P5426 FINISHED
Object Keio 5000 series (second generation)
The Keio 5000 series (second generation) is a modern Japanese electric multiple unit train operated by Keio Corporation, known for its comfortable commuter service and advanced onboard systems on the Keio network in Tokyo.
 E973009 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: Keio 5000 series (second generation) | Statement: [Keio Line, usesRollingStock, Keio 5000 series (second generation)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Keio 5000 series (second generation)
Context triple: [Keio Line, usesRollingStock, Keio 5000 series (second generation)]
  • A. Keio 7000 series
    The Keio 7000 series is a Japanese electric multiple unit train type operated by Keio Corporation, known for serving commuter routes in the Tokyo area.
  • B. Keio 8000 series
    The Keio 8000 series is a Japanese electric multiple unit train type operated by Keio Corporation on its commuter rail lines in the Tokyo area.
  • C. Keio 1000 series EMU
    The Keio 1000 series EMU is a Japanese electric multiple unit train operated by Keio Corporation, known for serving Tokyo’s Inokashira Line with modern, colorful commuter rolling stock.
  • D. Keio 9000 series
    The Keio 9000 series is a Japanese electric multiple unit train type operated by Keio Corporation on its commuter rail lines in the Tokyo area.
  • E. 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.
  • 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: Keio 5000 series (second generation)
Triple: [Keio Line, usesRollingStock, Keio 5000 series (second generation)]
Generated description
The Keio 5000 series (second generation) is a modern Japanese electric multiple unit train operated by Keio Corporation, known for its comfortable commuter service and advanced onboard systems on the Keio network in Tokyo.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Keio 5000 series (second generation)
Target entity description: The Keio 5000 series (second generation) is a modern Japanese electric multiple unit train operated by Keio Corporation, known for its comfortable commuter service and advanced onboard systems on the Keio network in Tokyo.
  • A. Keio 7000 series
    The Keio 7000 series is a Japanese electric multiple unit train type operated by Keio Corporation, known for serving commuter routes in the Tokyo area.
  • B. Keio 8000 series
    The Keio 8000 series is a Japanese electric multiple unit train type operated by Keio Corporation on its commuter rail lines in the Tokyo area.
  • C. Keio 1000 series EMU
    The Keio 1000 series EMU is a Japanese electric multiple unit train operated by Keio Corporation, known for serving Tokyo’s Inokashira Line with modern, colorful commuter rolling stock.
  • D. Keio 9000 series
    The Keio 9000 series is a Japanese electric multiple unit train type operated by Keio Corporation on its commuter rail lines in the Tokyo area.
  • E. 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.
  • 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_69d6ab4780948190bdb9f7620c2ac27e completed April 8, 2026, 7:23 p.m.
NER Named-entity recognition batch_69d904227958819084dbd5eb2566c735 completed April 10, 2026, 2:07 p.m.
NED1 Entity disambiguation (via context triple) batch_69f61e3ee53c81909c2e4620a12a46da completed May 2, 2026, 3:54 p.m.
NEDg Description generation batch_69f61f0dc1e08190bfd2452287d534c9 completed May 2, 2026, 3:58 p.m.
NED2 Entity disambiguation (via description) batch_69f61fa2073881909f683966772bd6b2 completed May 2, 2026, 4 p.m.
Created at: April 8, 2026, 9:47 p.m.