Triple

T21587353
Position Surface form Disambiguated ID Type / Status
Subject Tobu ATS E532684 entity
Predicate railwayLineUsedOn P848 FINISHED
Object Tobu Railway lines
Tobu Railway lines are a network of private railway routes in the Greater Tokyo area of Japan operated by Tobu Railway, serving both urban commuters and regional travelers.
 E1491042 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: Tobu Railway lines | Statement: [Tobu ATS, railwayLineUsedOn, Tobu Railway lines]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Tobu Railway lines
Context triple: [Tobu ATS, railwayLineUsedOn, Tobu Railway lines]
  • A. Tobu Tojo Line
    The Tobu Tojo Line is a major private railway line in the Greater Tokyo area operated by Tobu Railway, connecting Ikebukuro in central Tokyo with suburban Saitama Prefecture.
  • B. Tobu Daishi Line
    The Tobu Daishi Line is a short commuter railway line in Tokyo, Japan, operated by Tobu Railway and known for serving the area around the famous Nishiarai Daishi temple.
  • C. Tobu Nikko Line
    The Tobu Nikko Line is a private railway line in Japan operated by Tobu Railway that connects the Tokyo area with the historic and scenic Nikko region in Tochigi Prefecture.
  • D. Keisei Electric Railway lines
    Keisei Electric Railway lines are a group of private railway routes in the Greater Tokyo area best known for linking central Tokyo with Narita International Airport and serving commuter and interurban travel in Chiba Prefecture.
  • E. Tobu Urban Park Line
    Tobu Urban Park Line is a Japanese private railway line operated by Tobu Railway that runs through the northern suburbs of the Greater Tokyo area, connecting key commuter hubs.
  • 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: Tobu Railway lines
Triple: [Tobu ATS, railwayLineUsedOn, Tobu Railway lines]
Generated description
Tobu Railway lines are a network of private railway routes in the Greater Tokyo area of Japan operated by Tobu Railway, serving both urban commuters and regional travelers.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Tobu Railway lines
Target entity description: Tobu Railway lines are a network of private railway routes in the Greater Tokyo area of Japan operated by Tobu Railway, serving both urban commuters and regional travelers.
  • A. Tobu Tojo Line
    The Tobu Tojo Line is a major private railway line in the Greater Tokyo area operated by Tobu Railway, connecting Ikebukuro in central Tokyo with suburban Saitama Prefecture.
  • B. Tobu Daishi Line
    The Tobu Daishi Line is a short commuter railway line in Tokyo, Japan, operated by Tobu Railway and known for serving the area around the famous Nishiarai Daishi temple.
  • C. Tobu Nikko Line
    The Tobu Nikko Line is a private railway line in Japan operated by Tobu Railway that connects the Tokyo area with the historic and scenic Nikko region in Tochigi Prefecture.
  • D. Keisei Electric Railway lines
    Keisei Electric Railway lines are a group of private railway routes in the Greater Tokyo area best known for linking central Tokyo with Narita International Airport and serving commuter and interurban travel in Chiba Prefecture.
  • E. Tobu Urban Park Line
    Tobu Urban Park Line is a Japanese private railway line operated by Tobu Railway that runs through the northern suburbs of the Greater Tokyo area, connecting key commuter hubs.
  • 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_69e0c46251648190876f0427cf2d321b completed April 16, 2026, 11:13 a.m.
NER Named-entity recognition batch_69eeeb621ab88190a33a943424ffb306 completed April 27, 2026, 4:51 a.m.
NED1 Entity disambiguation (via context triple) batch_6a09f67f08208190a1633fd2a28e2fa2 completed May 17, 2026, 5:10 p.m.
NEDg Description generation batch_6a09f6fc3d7081909edf8cc575b6293e completed May 17, 2026, 5:12 p.m.
NED2 Entity disambiguation (via description) batch_6a09f79098e48190acdcad615098c55a completed May 17, 2026, 5:14 p.m.
Created at: April 16, 2026, 6:31 p.m.