Triple

T20413457
Position Surface form Disambiguated ID Type / Status
Subject Grass Valley, California E500643 entity
Predicate hasHeritageSite P923 FINISHED
Object North Star Mine Powerhouse
The North Star Mine Powerhouse is a historic industrial building in Grass Valley, California, that once supplied electrical power to one of the region’s major gold mines and now serves as a preserved heritage landmark.
 E1430286 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: North Star Mine Powerhouse | Statement: [Grass Valley, California, hasHeritageSite, North Star Mine Powerhouse]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: North Star Mine Powerhouse
Context triple: [Grass Valley, California, hasHeritageSite, North Star Mine Powerhouse]
  • A. Shanan Power House
    Shanan Power House is a hydroelectric power station in Himachal Pradesh, India, that generates electricity using the waters of the Uhl River.
  • B. Holm Powerhouse
    Holm Powerhouse is a hydroelectric generating station within California’s Hetch Hetchy Power System that converts water from the Hetch Hetchy aqueduct into electricity.
  • C. Oak Grove Powerhouse
    Oak Grove Powerhouse is a hydroelectric generating station that converts water released from Oak Grove Dam into electrical power.
  • D. Healy Power Plant
    Healy Power Plant is a coal-fired power generation facility located near the community of Healy in interior Alaska.
  • E. Kirkwood Powerhouse
    Kirkwood Powerhouse is a hydroelectric generating facility within San Francisco’s Hetch Hetchy Power System that converts water from the Hetch Hetchy project into electricity.
  • 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: North Star Mine Powerhouse
Triple: [Grass Valley, California, hasHeritageSite, North Star Mine Powerhouse]
Generated description
The North Star Mine Powerhouse is a historic industrial building in Grass Valley, California, that once supplied electrical power to one of the region’s major gold mines and now serves as a preserved heritage landmark.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: North Star Mine Powerhouse
Target entity description: The North Star Mine Powerhouse is a historic industrial building in Grass Valley, California, that once supplied electrical power to one of the region’s major gold mines and now serves as a preserved heritage landmark.
  • A. Shanan Power House
    Shanan Power House is a hydroelectric power station in Himachal Pradesh, India, that generates electricity using the waters of the Uhl River.
  • B. Holm Powerhouse
    Holm Powerhouse is a hydroelectric generating station within California’s Hetch Hetchy Power System that converts water from the Hetch Hetchy aqueduct into electricity.
  • C. Oak Grove Powerhouse
    Oak Grove Powerhouse is a hydroelectric generating station that converts water released from Oak Grove Dam into electrical power.
  • D. Healy Power Plant
    Healy Power Plant is a coal-fired power generation facility located near the community of Healy in interior Alaska.
  • E. Kirkwood Powerhouse
    Kirkwood Powerhouse is a hydroelectric generating facility within San Francisco’s Hetch Hetchy Power System that converts water from the Hetch Hetchy project into electricity.
  • 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_69e0b4a935588190b9446a99b37ced44 completed April 16, 2026, 10:06 a.m.
NER Named-entity recognition batch_69e67a417f208190be9bc11650ee0a87 completed April 20, 2026, 7:10 p.m.
NED1 Entity disambiguation (via context triple) batch_6a087b2626048190a9fb9aa62537d820 completed May 16, 2026, 2:11 p.m.
NEDg Description generation batch_6a08801702488190ba3122edb09cdaab completed May 16, 2026, 2:32 p.m.
NED2 Entity disambiguation (via description) batch_6a08811c9af081908d898134bf80452e completed May 16, 2026, 2:37 p.m.
Created at: April 16, 2026, 11:30 a.m.