Triple

T21213944
Position Surface form Disambiguated ID Type / Status
Subject California portion of Truckee River Basin E522788 entity
Predicate hasOutflowControlStructure P25010 FINISHED
Object Lake Tahoe Dam at Tahoe City
The Lake Tahoe Dam at Tahoe City is a concrete dam at the lake’s outlet that regulates the water level of Lake Tahoe and controls the flow of the Truckee River.
E1472617 NE FINISHED

How this triple was built (5 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: Lake Tahoe Dam at Tahoe City | Statement: [California portion of Truckee River Basin, hasOutflowControlStructure, Lake Tahoe Dam at Tahoe City]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Lake Tahoe Dam at Tahoe City
Context triple: [California portion of Truckee River Basin, hasOutflowControlStructure, Lake Tahoe Dam at Tahoe City]
  • A. Nimbus Dam and Lake Natoma
    Nimbus Dam and Lake Natoma form a popular recreational area on the American River near Sacramento, known for boating, fishing, kayaking, and scenic trails.
  • B. Arrow Dam
    Arrow Dam, formally known as Keenleyside Dam, is a large hydroelectric and flood-control dam on the Columbia River in British Columbia, Canada.
  • C. Topaz Lake Dam
    Topaz Lake Dam is an engineered structure that impounds water to create and regulate Topaz Lake along the California–Nevada border.
  • D. El Capitan Dam
    El Capitan Dam is a large concrete arch dam in San Diego County, California, built for water storage, flood control, and recreation.
  • E. New Bullards Bar Dam
    New Bullards Bar Dam is a large concrete arch dam on the North Yuba River in Northern California, primarily used for hydroelectric power generation, flood control, and water storage.
  • 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: Lake Tahoe Dam at Tahoe City
Triple: [California portion of Truckee River Basin, hasOutflowControlStructure, Lake Tahoe Dam at Tahoe City]
Generated description
The Lake Tahoe Dam at Tahoe City is a concrete dam at the lake’s outlet that regulates the water level of Lake Tahoe and controls the flow of the Truckee River.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Lake Tahoe Dam at Tahoe City
Target entity description: The Lake Tahoe Dam at Tahoe City is a concrete dam at the lake’s outlet that regulates the water level of Lake Tahoe and controls the flow of the Truckee River.
  • A. Nimbus Dam and Lake Natoma
    Nimbus Dam and Lake Natoma form a popular recreational area on the American River near Sacramento, known for boating, fishing, kayaking, and scenic trails.
  • B. Arrow Dam
    Arrow Dam, formally known as Keenleyside Dam, is a large hydroelectric and flood-control dam on the Columbia River in British Columbia, Canada.
  • C. Topaz Lake Dam
    Topaz Lake Dam is an engineered structure that impounds water to create and regulate Topaz Lake along the California–Nevada border.
  • D. El Capitan Dam
    El Capitan Dam is a large concrete arch dam in San Diego County, California, built for water storage, flood control, and recreation.
  • E. New Bullards Bar Dam
    New Bullards Bar Dam is a large concrete arch dam on the North Yuba River in Northern California, primarily used for hydroelectric power generation, flood control, and water storage.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: hasOutflowControlStructure
Context triple: [California portion of Truckee River Basin, hasOutflowControlStructure, Lake Tahoe Dam at Tahoe City]
  • A. flowControl
    Indicates a relationship where one entity regulates, directs, or manages the rate or sequence of another entity’s operations or movement.
  • B. hasNoSurfaceOutflow
    Indicates that the entity does not discharge water or other contents to an external surface outlet, such as a river, stream, or ocean.
  • C. regulatesOutflowOf
    Indicates that one entity controls, modulates, or governs the rate or amount of outflow from another entity.
  • D. hasFloodControlStructure chosen
    Indicates that an entity possesses or is equipped with a structure designed to manage, control, or mitigate flooding.
  • E. hasInlet
    Indicates that one entity serves as an inlet or entry point through which another entity receives a flow of material, energy, or fluid.
  • F. None of above.

Provenance (6 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_69e0b511ed84819099b449b4a111085c completed April 16, 2026, 10:08 a.m.
NER Named-entity recognition batch_69e7347088488190aa764b3f4bbac44d completed April 21, 2026, 8:25 a.m.
NED1 Entity disambiguation (via context triple) batch_6a097ed6e6288190a6c0a10338458117 completed May 17, 2026, 8:39 a.m.
NEDg Description generation batch_6a097ff28ed0819081cea66e9ea5eaa2 completed May 17, 2026, 8:44 a.m.
NED2 Entity disambiguation (via description) batch_6a0981477234819093bc90f3578ddccf completed May 17, 2026, 8:50 a.m.
PD Predicate disambiguation batch_69e5f6094e3c81909ee9699e00d371f7 completed April 20, 2026, 9:46 a.m.
Created at: April 16, 2026, 3:39 p.m.