Triple

T1979323

Position	Surface form	Disambiguated ID	Type / Status
Subject	Fukushima Daiichi nuclear disaster	`E42988`	entity
Predicate	location	`P40`	FINISHED
Object	Fukushima Daiichi Nuclear Power Plant Fukushima Daiichi Nuclear Power Plant is a coastal Japanese nuclear power station in Ōkuma, Fukushima Prefecture, widely known as the site of the 2011 reactor meltdowns following a massive earthquake and tsunami.	`E223644`	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: Fukushima Daiichi Nuclear Power Plant | Statement: [Fukushima Daiichi nuclear disaster, location, Fukushima Daiichi Nuclear Power Plant]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Fukushima Daiichi Nuclear Power Plant
Context triple: [Fukushima Daiichi nuclear disaster, location, Fukushima Daiichi Nuclear Power Plant]

A. Fukushima Daiichi nuclear disaster
The Fukushima Daiichi nuclear disaster was a 2011 catastrophic failure at a Japanese nuclear power plant triggered by a massive earthquake and tsunami, leading to core meltdowns, radioactive releases, and long-term environmental and policy impacts worldwide.
B. K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
C. Hatch Nuclear Power Plant
Hatch Nuclear Power Plant is a commercial nuclear power generating facility in Georgia that supplies electricity to the regional grid as part of Southern Company's energy portfolio.
D. Yokkaichi Industrial Complex
Yokkaichi Industrial Complex is a major Japanese petrochemical and heavy industrial zone known for its large-scale refineries, chemical plants, and historical impact on environmental policy.
E. Kalinin nuclear power plant
The Kalinin nuclear power plant is a major Russian nuclear power facility that supplies electricity to the central regions of the country.
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: Fukushima Daiichi Nuclear Power Plant
Triple: [Fukushima Daiichi nuclear disaster, location, Fukushima Daiichi Nuclear Power Plant]

Generated description

Fukushima Daiichi Nuclear Power Plant is a coastal Japanese nuclear power station in Ōkuma, Fukushima Prefecture, widely known as the site of the 2011 reactor meltdowns following a massive earthquake and tsunami.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Fukushima Daiichi Nuclear Power Plant
Target entity description: Fukushima Daiichi Nuclear Power Plant is a coastal Japanese nuclear power station in Ōkuma, Fukushima Prefecture, widely known as the site of the 2011 reactor meltdowns following a massive earthquake and tsunami.

A. Fukushima Daiichi nuclear disaster
The Fukushima Daiichi nuclear disaster was a 2011 catastrophic failure at a Japanese nuclear power plant triggered by a massive earthquake and tsunami, leading to core meltdowns, radioactive releases, and long-term environmental and policy impacts worldwide.
B. K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
C. Hatch Nuclear Power Plant
Hatch Nuclear Power Plant is a commercial nuclear power generating facility in Georgia that supplies electricity to the regional grid as part of Southern Company's energy portfolio.
D. Yokkaichi Industrial Complex
Yokkaichi Industrial Complex is a major Japanese petrochemical and heavy industrial zone known for its large-scale refineries, chemical plants, and historical impact on environmental policy.
E. Kalinin nuclear power plant
The Kalinin nuclear power plant is a major Russian nuclear power facility that supplies electricity to the central regions of the country.
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.