Triple

T12205649
Position Surface form Disambiguated ID Type / Status
Subject NRX reactor E290828 entity
Predicate successor P78 FINISHED
Object NRU reactor E290829 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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: NRU reactor | Statement: [NRX reactor, successor, NRU reactor]

Disambiguation candidates (1 decision)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: NRU reactor
Context triple: [NRX reactor, successor, NRU reactor]
  • A. NRU reactor chosen
    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.
  • B. S2W nuclear reactor
    The S2W nuclear reactor was an early U.S. Navy pressurized water reactor design that powered the world’s first operational nuclear-powered submarine, USS Nautilus.
  • C. Dimona reactor
    The Dimona reactor is a highly secretive nuclear research facility in Israel widely believed to be central to the country’s undeclared nuclear weapons program.
  • D. IBR-2 reactor
    The IBR-2 reactor is a fast pulsed research nuclear reactor used primarily for neutron scattering experiments in condensed matter physics and materials science.
  • E. PM-3A nuclear reactor
    The PM-3A nuclear reactor was a small U.S. Navy-built nuclear power plant that supplied electricity and heat to McMurdo Station in Antarctica during the 1960s and early 1970s.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 batches)

Stage Batch ID Job type Status
creating batch_69d6ab65923081909acfc61b7a612233 elicitation completed
NER batch_69d91c7c9084819085e7d2f9038f409f ner completed
NED1 batch_69f60a9ae3d48190a220ccd37ce8d3e7 ned_source_triple completed
Created at: April 8, 2026, 9:51 p.m.