Triple
T9296225
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Fukushima Daiichi Nuclear Power Plant |
E223644
|
entity |
| Predicate | hydrogenExplosionsOccurredIn |
P87482
|
FINISHED |
| Object |
Unit 4 reactor building
The Unit 4 reactor building at the Fukushima Daiichi Nuclear Power Plant is a heavily damaged structure that became emblematic of the 2011 nuclear disaster following severe hydrogen explosions and subsequent radioactive releases.
|
E790757
|
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: Unit 4 reactor building | Statement: [Fukushima Daiichi Nuclear Power Plant, hydrogenExplosionsOccurredIn, Unit 4 reactor building]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Unit 4 reactor building Context triple: [Fukushima Daiichi Nuclear Power Plant, hydrogenExplosionsOccurredIn, Unit 4 reactor building]
-
A.
Unit 3 reactor building
The Unit 3 reactor building at the Fukushima Daiichi Nuclear Power Plant is one of the severely damaged reactor structures from the 2011 disaster, known for suffering a catastrophic explosion and major radioactive release.
-
B.
Reactor No. 4
Reactor No. 4 was the RBMK nuclear reactor at the Chernobyl Nuclear Power Plant whose catastrophic explosion in 1986 caused one of the worst nuclear disasters in history.
-
C.
K Reactor
K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
-
D.
NRU reactor
The NRU reactor was a Canadian research nuclear reactor at Chalk River Laboratories known for producing medical isotopes and supporting materials testing and reactor physics research.
-
E.
D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
- 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: Unit 4 reactor building Triple: [Fukushima Daiichi Nuclear Power Plant, hydrogenExplosionsOccurredIn, Unit 4 reactor building]
Generated description
The Unit 4 reactor building at the Fukushima Daiichi Nuclear Power Plant is a heavily damaged structure that became emblematic of the 2011 nuclear disaster following severe hydrogen explosions and subsequent radioactive releases.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Unit 4 reactor building Target entity description: The Unit 4 reactor building at the Fukushima Daiichi Nuclear Power Plant is a heavily damaged structure that became emblematic of the 2011 nuclear disaster following severe hydrogen explosions and subsequent radioactive releases.
-
A.
Unit 3 reactor building
The Unit 3 reactor building at the Fukushima Daiichi Nuclear Power Plant is one of the severely damaged reactor structures from the 2011 disaster, known for suffering a catastrophic explosion and major radioactive release.
-
B.
Reactor No. 4
Reactor No. 4 was the RBMK nuclear reactor at the Chernobyl Nuclear Power Plant whose catastrophic explosion in 1986 caused one of the worst nuclear disasters in history.
-
C.
K Reactor
K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
-
D.
NRU reactor
The NRU reactor was a Canadian research nuclear reactor at Chalk River Laboratories known for producing medical isotopes and supporting materials testing and reactor physics research.
-
E.
D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
- 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_69ca8423edb08190bc0c91287a484768 |
completed | March 30, 2026, 2:09 p.m. |
| NER | Named-entity recognition | batch_69cd089c9c588190967404c9eb938dfb |
completed | April 1, 2026, 11:59 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69d0c7717f30819095fc3e6e4f765790 |
completed | April 4, 2026, 8:10 a.m. |
| NEDg | Description generation | batch_69d0c8f9a7648190943454a912c9da83 |
completed | April 4, 2026, 8:16 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69d0c978ed448190ad2e5aacdcb91855 |
completed | April 4, 2026, 8:19 a.m. |
Created at: March 30, 2026, 7:36 p.m.