Triple

T1979338
Position Surface form Disambiguated ID Type / Status
Subject Fukushima Daiichi nuclear disaster E42988 entity
Predicate operator P179 FINISHED
Object Tokyo Electric Power Company
Tokyo Electric Power Company is Japan’s largest electric utility, internationally known for operating the Fukushima Daiichi nuclear plant involved in the 2011 nuclear disaster.
 E223647 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: Tokyo Electric Power Company | Statement: [Fukushima Daiichi nuclear disaster, operator, Tokyo Electric Power Company]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Tokyo Electric Power Company
Context triple: [Fukushima Daiichi nuclear disaster, operator, Tokyo Electric Power Company]
  • A. Nippon Electric Company
    Nippon Electric Company, now known as NEC Corporation, is a major Japanese multinational provider of information technology and electronics solutions.
  • B. Tokyu Corporation
    Tokyu Corporation is a major Japanese private railway and real estate company based in Tokyo, known for operating extensive rail networks and developing commercial and residential areas, particularly around Shibuya.
  • C. Engie
    Engie is a major French multinational utility company specializing in electricity, natural gas, and energy services, with a strong focus on renewable and low-carbon energy solutions.
  • D. Keio Corporation
    Keio Corporation is a major Japanese private railway and transportation company operating rail lines and related services in the Tokyo metropolitan area.
  • E. Tokyo Tower Co., Ltd.
    Tokyo Tower Co., Ltd. is the company responsible for operating and maintaining Tokyo Tower, one of Japan’s most iconic landmarks and tourist attractions.
  • 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: Tokyo Electric Power Company
Triple: [Fukushima Daiichi nuclear disaster, operator, Tokyo Electric Power Company]
Generated description
Tokyo Electric Power Company is Japan’s largest electric utility, internationally known for operating the Fukushima Daiichi nuclear plant involved in the 2011 nuclear disaster.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Tokyo Electric Power Company
Target entity description: Tokyo Electric Power Company is Japan’s largest electric utility, internationally known for operating the Fukushima Daiichi nuclear plant involved in the 2011 nuclear disaster.
  • A. Nippon Electric Company
    Nippon Electric Company, now known as NEC Corporation, is a major Japanese multinational provider of information technology and electronics solutions.
  • B. Tokyu Corporation
    Tokyu Corporation is a major Japanese private railway and real estate company based in Tokyo, known for operating extensive rail networks and developing commercial and residential areas, particularly around Shibuya.
  • C. Engie
    Engie is a major French multinational utility company specializing in electricity, natural gas, and energy services, with a strong focus on renewable and low-carbon energy solutions.
  • D. Keio Corporation
    Keio Corporation is a major Japanese private railway and transportation company operating rail lines and related services in the Tokyo metropolitan area.
  • E. Tokyo Tower Co., Ltd.
    Tokyo Tower Co., Ltd. is the company responsible for operating and maintaining Tokyo Tower, one of Japan’s most iconic landmarks and tourist attractions.
  • 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_69a8871289048190b00b0d7744b7b2b1 completed March 4, 2026, 7:25 p.m.
NER Named-entity recognition batch_69abb7c698748190a10da0901952df07 completed March 7, 2026, 5:29 a.m.
NED1 Entity disambiguation (via context triple) batch_69ae032988ec8190b9012cbb77e7efa4 completed March 8, 2026, 11:15 p.m.
NEDg Description generation batch_69ae03c4faac8190a13aa0882eda3629 completed March 8, 2026, 11:18 p.m.
NED2 Entity disambiguation (via description) batch_69ae0445a9608190918a7bd45b9bf999 completed March 8, 2026, 11:20 p.m.
Created at: March 4, 2026, 7:36 p.m.