Triple

T13089339
Position Surface form Disambiguated ID Type / Status
Subject Contra Costa Water District E310418 entity
Predicate operatesFacility P4904 FINISHED
Object Los Vaqueros Reservoir
Los Vaqueros Reservoir is a major man-made water storage facility in Contra Costa County, California, that supplies drinking water, supports wildlife habitat, and provides recreational opportunities.
 E1077745 NE FINISHED

How this triple was built (4 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
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: Los Vaqueros Reservoir | Statement: [Contra Costa Water District, operatesFacility, Los Vaqueros Reservoir]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Los Vaqueros Reservoir
Context triple: [Contra Costa Water District, operatesFacility, Los Vaqueros Reservoir]
  • A. La Mesa Reservoir
    La Mesa Reservoir is a major water storage facility in the Philippines that supplies potable water to Metro Manila and is located within the protected La Mesa Watershed.
  • B. Camanche Reservoir
    Camanche Reservoir is a man-made lake in California used for water storage, flood control, recreation, and wildlife habitat along the Mokelumne River.
  • C. Abiquiu Reservoir
    Abiquiu Reservoir is a man-made lake in northern New Mexico known for its scenic desert landscape, recreational opportunities, and role in regional water storage and management.
  • D. Sweetwater Reservoir
    Sweetwater Reservoir is a man-made lake in San Diego County, California, that serves as a key water supply and recreational area for the surrounding communities.
  • E. Los Barreales Reservoir
    Los Barreales Reservoir is an artificial lake in Argentina’s Neuquén Province, created on the Neuquén River and known for hydroelectric use, water regulation, and nearby paleontological sites.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
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: Los Vaqueros Reservoir
Triple: [Contra Costa Water District, operatesFacility, Los Vaqueros Reservoir]
Generated description
Los Vaqueros Reservoir is a major man-made water storage facility in Contra Costa County, California, that supplies drinking water, supports wildlife habitat, and provides recreational opportunities.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Los Vaqueros Reservoir
Target entity description: Los Vaqueros Reservoir is a major man-made water storage facility in Contra Costa County, California, that supplies drinking water, supports wildlife habitat, and provides recreational opportunities.
  • A. La Mesa Reservoir
    La Mesa Reservoir is a major water storage facility in the Philippines that supplies potable water to Metro Manila and is located within the protected La Mesa Watershed.
  • B. Camanche Reservoir
    Camanche Reservoir is a man-made lake in California used for water storage, flood control, recreation, and wildlife habitat along the Mokelumne River.
  • C. Abiquiu Reservoir
    Abiquiu Reservoir is a man-made lake in northern New Mexico known for its scenic desert landscape, recreational opportunities, and role in regional water storage and management.
  • D. Sweetwater Reservoir
    Sweetwater Reservoir is a man-made lake in San Diego County, California, that serves as a key water supply and recreational area for the surrounding communities.
  • E. Los Barreales Reservoir
    Los Barreales Reservoir is an artificial lake in Argentina’s Neuquén Province, created on the Neuquén River and known for hydroelectric use, water regulation, and nearby paleontological sites.
  • F. None of above. chosen

Provenance (5 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69d806a733548190989cfd4ce981ca33 completed April 9, 2026, 8:05 p.m.
NER Named-entity recognition batch_69d98138a1d481908a139f2f67eb3472 completed April 10, 2026, 11:01 p.m.
NED1 Entity disambiguation (via context triple) batch_69fcb63f006c8190997c0f3cdc6efd6c completed May 7, 2026, 3:56 p.m.
NEDg Description generation batch_69fcc4734d388190b4a06799e362cfa9 completed May 7, 2026, 4:57 p.m.
NED2 Entity disambiguation (via description) batch_69fcc51f30588190bfe6efd1dc84d921 completed May 7, 2026, 5 p.m.
Created at: April 9, 2026, 9:03 p.m.