Triple

T18303969
Position Surface form Disambiguated ID Type / Status
Subject Penobscot River watershed E438434 entity
Predicate hasTributary P415 FINISHED
Object East Branch Penobscot River — NE NERFINISHED

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: East Branch Penobscot River | Statement: [Penobscot River watershed, hasTributary, East Branch Penobscot River]

Disambiguation candidates (2 decisions)

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: East Branch Penobscot River
Context triple: [Penobscot River watershed, hasTributary, East Branch Penobscot River]
  • A. Damariscotta River
    The Damariscotta River is a tidal estuary in coastal Maine renowned for its oyster beds, scenic beauty, and historic shell middens.
  • B. Penobscot River
    The Penobscot River is a major river in Maine that flows through central and eastern parts of the state to Penobscot Bay, historically important for transportation, logging, and fisheries.
  • C. Presumpscot River
    The Presumpscot River is a major river in southern Maine that flows from Sebago Lake to Casco Bay, historically important for industry and now valued for recreation and hydropower.
  • D. Sebasticook River
    The Sebasticook River is a major tributary of the Kennebec River in central Maine, known for its role in regional wildlife habitat and historic mill and dam sites.
  • E. Aroostook River
    The Aroostook River is a major tributary of the Saint John River flowing through northern Maine and western New Brunswick, known for its scenic valleys and recreational fishing and paddling.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: East Branch Penobscot River
Target entity description: The East Branch Penobscot River is a major wilderness river in northern Maine known for its remote forests, whitewater stretches, and role in the region’s logging and outdoor recreation.
  • A. Damariscotta River
    The Damariscotta River is a tidal estuary in coastal Maine renowned for its oyster beds, scenic beauty, and historic shell middens.
  • B. Penobscot River chosen
    The Penobscot River is a major river in Maine that flows through central and eastern parts of the state to Penobscot Bay, historically important for transportation, logging, and fisheries.
  • C. Presumpscot River
    The Presumpscot River is a major river in southern Maine that flows from Sebago Lake to Casco Bay, historically important for industry and now valued for recreation and hydropower.
  • D. Sebasticook River
    The Sebasticook River is a major tributary of the Kennebec River in central Maine, known for its role in regional wildlife habitat and historic mill and dam sites.
  • E. Aroostook River
    The Aroostook River is a major tributary of the Saint John River flowing through northern Maine and western New Brunswick, known for its scenic valleys and recreational fishing and paddling.
  • F. None of above.

Provenance (2 batches)

Stage Batch ID Job type Status
creating batch_69d8b915e3e881909125d760c15d0c29 elicitation completed
NER batch_69e5018176d481909536f50689f878d2 ner completed
Created at: April 10, 2026, 10:35 a.m.