Triple

T16534517
Position Surface form Disambiguated ID Type / Status
Subject CSX Railroad Bridge E401654 entity
Predicate crosses P416 FINISHED
Object Anacostia River in Washington, D.C. E38570 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: Anacostia River in Washington, D.C. | Statement: [CSX Railroad Bridge, crosses, Anacostia River in Washington, D.C.]

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: Anacostia River in Washington, D.C.
Context triple: [CSX Railroad Bridge, crosses, Anacostia River in Washington, D.C.]
  • A. Anacostia River and Potomac River
    The Anacostia River and Potomac River are two major waterways in the Washington, D.C. area whose confluence forms a significant geographic and ecological feature of the region.
  • B. Anacostia River chosen
    The Anacostia River is a tidal river in the Washington, D.C. area known for its historical significance, urban setting, and long-running environmental restoration efforts.
  • C. Northeast Branch Anacostia River
    The Northeast Branch Anacostia River is a major tributary of the Anacostia River in Maryland, flowing through suburban communities and parklands before joining the river system that leads to Washington, D.C.
  • D. Northwest Branch Anacostia River
    The Northwest Branch Anacostia River is a major tributary of the Anacostia River in Maryland and Washington, D.C., flowing through parkland and suburban communities and supporting popular recreational trails along its banks.
  • E. Anacostia
    Anacostia is a historic neighborhood in Southeast Washington, D.C., known for its African American heritage and cultural landmarks.
  • 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_69d88384bc30819084229e7dcdc39a41 elicitation completed
NER batch_69e32eda42548190be61efb25a44a554 ner completed
NED1 batch_6a006093244081909ae74674de966d6d ned_source_triple completed
Created at: April 10, 2026, 5:15 a.m.