Triple

T15058395
Position Surface form Disambiguated ID Type / Status
Subject Gampaha District E379556 entity
Predicate contains P35 FINISHED
Object Katana
Katana is a town and administrative division in Sri Lanka’s Western Province, situated within the Gampaha District.
 E1135861 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: Katana | Statement: [Gampaha District, contains, Katana]

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: Katana
Context triple: [Gampaha District, contains, Katana]
  • A. Katano
    Katano is a city in Osaka Prefecture, Japan, known for its residential suburbs and proximity to the Osaka metropolitan area.
  • B. Tsurugi
    Tsurugi is a Japanese Shinkansen train service operating on the Hokuriku Shinkansen line, primarily providing all-stations shuttle connections between Toyama and Kanazawa.
  • C. Banryū
    Banryū was a Japanese warship that served in the late Edo period and took part in the Boshin War’s Naval Battle of Hakodate.
  • D. Kusanagi-no-Tsurugi
    Kusanagi-no-Tsurugi is a legendary Japanese sword of divine origin, revered as one of the three sacred treasures symbolizing the authority of the Emperor.
  • E. Samurai
    Samurai is a spinning thrill ride at Thorpe Park in the UK known for its intense, disorienting inversions and high-speed rotations.
  • 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: Katana
Target entity description: Katana is a town and administrative division in Sri Lanka’s Western Province, situated within the Gampaha District.
  • A. Katano
    Katano is a city in Osaka Prefecture, Japan, known for its residential suburbs and proximity to the Osaka metropolitan area.
  • B. Tsurugi
    Tsurugi is a Japanese Shinkansen train service operating on the Hokuriku Shinkansen line, primarily providing all-stations shuttle connections between Toyama and Kanazawa.
  • C. Banryū
    Banryū was a Japanese warship that served in the late Edo period and took part in the Boshin War’s Naval Battle of Hakodate.
  • D. Kusanagi-no-Tsurugi
    Kusanagi-no-Tsurugi is a legendary Japanese sword of divine origin, revered as one of the three sacred treasures symbolizing the authority of the Emperor.
  • E. Samurai
    Samurai is a spinning thrill ride at Thorpe Park in the UK known for its intense, disorienting inversions and high-speed rotations.
  • F. None of above. chosen

How the object was described

The object's one-sentence description was generated by prompting gpt-5.1 with the object name and this triple as context.

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: Katana
Triple: [Gampaha District, contains, Katana]
Generated description
Katana is a town and administrative division in Sri Lanka’s Western Province, situated within the Gampaha District.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69d85cd64d108190853797a95c11cc45 elicitation completed
NER batch_69dedee50afc8190bf7b0f4bbe8c60a3 ner completed
NED1 batch_69fea5c2fcec8190800d1bda82c7352e ned_source_triple completed
NED2 batch_69feaa2fbafc8190b592d89b07b49765 ned_description completed
NEDg batch_69fea9c0ad748190989920efe418001c nedg completed
Created at: April 10, 2026, 3:01 a.m.