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 |
—
|
NE NERFINISHED |
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: 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.
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 (3 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. |
| PD | Predicate disambiguation | batch_69e5f6094e3c81909ee9699e00d371f7 |
completed | April 20, 2026, 9:46 a.m. |
Created at: April 16, 2026, 3:39 p.m.