Triple

T14979428
Position Surface form Disambiguated ID Type / Status
Subject Ishikari River headwaters E373535 entity
Predicate isUpstreamOf P5955 FINISHED
Object Ishikari River lower reaches — 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: Ishikari River lower reaches | Statement: [Ishikari River headwaters, isUpstreamOf, Ishikari River lower reaches]

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: Ishikari River lower reaches
Context triple: [Ishikari River headwaters, isUpstreamOf, Ishikari River lower reaches]
  • A. Ishikari River basin
    The Ishikari River basin is the extensive watershed in central Hokkaido, Japan, that collects and drains the waters of the Ishikari River and its tributaries into the Sea of Japan.
  • B. Ishikari River chosen
    The Ishikari River is one of Japan’s longest rivers, flowing through central Hokkaido and playing a key role in the region’s agriculture and settlement.
  • C. Kitakami River
    The Kitakami River is a major river in Japan’s Tōhoku region, flowing through Iwate and Miyagi Prefectures and known historically for its role in regional transport, agriculture, and flood control.
  • D. Yūbari River
    The Yūbari River is a river in Hokkaido, Japan, known for flowing through the former coal-mining city of Yūbari and into the Ishikari River system.
  • E. Sorachi River
    The Sorachi River is a major river in Hokkaido, Japan, flowing through central regions such as Furano and contributing to the area’s agriculture and scenery.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 batches)

Stage Batch ID Job type Status
creating batch_69d85ccbbcd48190acb56e7cf104d8ad elicitation completed
NER batch_69ded6fcebf481909f72cab577560d82 ner completed
Created at: April 10, 2026, 2:51 a.m.