Triple

T6038060
Position Surface form Disambiguated ID Type / Status
Subject Paranaíba River E134470 entity
Predicate hasReservoir P1025 FINISHED
Object Itumbiara Reservoir
Itumbiara Reservoir is a large artificial lake in Brazil created for hydroelectric power generation and water regulation on the Paranaíba River.
 E566496 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: Itumbiara Reservoir | Statement: [Paranaíba River, hasReservoir, Itumbiara Reservoir]

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: Itumbiara Reservoir
Context triple: [Paranaíba River, hasReservoir, Itumbiara Reservoir]
  • A. Samanalawewa Reservoir
    Samanalawewa Reservoir is a man-made lake in Sri Lanka known for its role in hydroelectric power generation and irrigation within the Sabaragamuwa Province.
  • B. Almatti Reservoir
    Almatti Reservoir is a major water body in Karnataka, India, formed on the Krishna River and used for irrigation, power generation, and regional water supply.
  • C. Tominé Reservoir
    Tominé Reservoir is a large artificial lake in Colombia’s Cundinamarca department, known for supplying water to Bogotá and serving as a popular site for sailing and other water sports.
  • D. Tantangara Reservoir
    Tantangara Reservoir is a major water storage lake in New South Wales, Australia, forming part of the Snowy Mountains Scheme for hydroelectric power generation and irrigation.
  • E. Bargi Reservoir
    Bargi Reservoir is a large artificial lake in Madhya Pradesh, India, created by the Bargi Dam on the Narmada River and used for irrigation, hydropower, and water supply.
  • 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: Itumbiara Reservoir
Target entity description: Itumbiara Reservoir is a large artificial lake in Brazil created for hydroelectric power generation and water regulation on the Paranaíba River.
  • A. Samanalawewa Reservoir
    Samanalawewa Reservoir is a man-made lake in Sri Lanka known for its role in hydroelectric power generation and irrigation within the Sabaragamuwa Province.
  • B. Almatti Reservoir
    Almatti Reservoir is a major water body in Karnataka, India, formed on the Krishna River and used for irrigation, power generation, and regional water supply.
  • C. Tominé Reservoir
    Tominé Reservoir is a large artificial lake in Colombia’s Cundinamarca department, known for supplying water to Bogotá and serving as a popular site for sailing and other water sports.
  • D. Tantangara Reservoir
    Tantangara Reservoir is a major water storage lake in New South Wales, Australia, forming part of the Snowy Mountains Scheme for hydroelectric power generation and irrigation.
  • E. Bargi Reservoir
    Bargi Reservoir is a large artificial lake in Madhya Pradesh, India, created by the Bargi Dam on the Narmada River and used for irrigation, hydropower, and water supply.
  • 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: Itumbiara Reservoir
Triple: [Paranaíba River, hasReservoir, Itumbiara Reservoir]
Generated description
Itumbiara Reservoir is a large artificial lake in Brazil created for hydroelectric power generation and water regulation on the Paranaíba River.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69c00875db5c819099dd5bb833ec43c2 elicitation completed
NER batch_69c056ccac948190a27547878d4db8e4 ner completed
NED1 batch_69c11cfbb4cc81909736d5d041dd0b23 ned_source_triple completed
NED2 batch_69c11ef6971c8190b8dde5568b330b41 ned_description completed
NEDg batch_69c11e89c75481908381df126a7b1661 nedg completed
Created at: March 22, 2026, 4:08 p.m.