Triple

T3405570
Position Surface form Disambiguated ID Type / Status
Subject Crystal Springs Reservoir E71762 entity
Predicate formedBy P972 FINISHED
Object Crystal Springs Dam
Crystal Springs Dam is a historic concrete gravity dam in San Mateo County, California, that impounds water to create the Crystal Springs Reservoir as part of the San Francisco Peninsula’s water supply system.
 E376996 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: Crystal Springs Dam | Statement: [Crystal Springs Reservoir, formedBy, Crystal Springs Dam]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Crystal Springs Dam
Context triple: [Crystal Springs Reservoir, formedBy, Crystal Springs Dam]
  • A. Forestville Dam
    Forestville Dam is a hydroelectric and recreational dam located on the Dead River near Marquette in Michigan’s Upper Peninsula.
  • B. Parker Dam
    Parker Dam is a concrete arch-gravity dam on the Colorado River best known for creating Lake Havasu and supplying water and hydroelectric power to parts of California and Arizona.
  • C. Gillespie Dam
    Gillespie Dam is an early 20th-century concrete gravity dam on Arizona’s Gila River, historically used for irrigation and now noted as a local landmark and wildlife habitat area.
  • D. Stewart Mountain Dam
    Stewart Mountain Dam is a concrete thin-arch dam on Arizona’s Salt River that forms Saguaro Lake and provides water storage, hydroelectric power, and recreation.
  • E. Riley Dam
    Riley Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow management.
  • 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: Crystal Springs Dam
Triple: [Crystal Springs Reservoir, formedBy, Crystal Springs Dam]
Generated description
Crystal Springs Dam is a historic concrete gravity dam in San Mateo County, California, that impounds water to create the Crystal Springs Reservoir as part of the San Francisco Peninsula’s water supply system.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Crystal Springs Dam
Target entity description: Crystal Springs Dam is a historic concrete gravity dam in San Mateo County, California, that impounds water to create the Crystal Springs Reservoir as part of the San Francisco Peninsula’s water supply system.
  • A. Forestville Dam
    Forestville Dam is a hydroelectric and recreational dam located on the Dead River near Marquette in Michigan’s Upper Peninsula.
  • B. Parker Dam
    Parker Dam is a concrete arch-gravity dam on the Colorado River best known for creating Lake Havasu and supplying water and hydroelectric power to parts of California and Arizona.
  • C. Gillespie Dam
    Gillespie Dam is an early 20th-century concrete gravity dam on Arizona’s Gila River, historically used for irrigation and now noted as a local landmark and wildlife habitat area.
  • D. Stewart Mountain Dam
    Stewart Mountain Dam is a concrete thin-arch dam on Arizona’s Salt River that forms Saguaro Lake and provides water storage, hydroelectric power, and recreation.
  • E. Riley Dam
    Riley Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow management.
  • 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_69ad85aac4808190a092c9cc8911f584 completed March 8, 2026, 2:20 p.m.
NER Named-entity recognition batch_69adb8eaa41c819095a4d51aec074649 completed March 8, 2026, 5:59 p.m.
NED1 Entity disambiguation (via context triple) batch_69b4881cd6f081908981db17758146f7 completed March 13, 2026, 9:56 p.m.
NEDg Description generation batch_69b48a9a55fc8190bc7de7c2c1e9bf76 completed March 13, 2026, 10:07 p.m.
NED2 Entity disambiguation (via description) batch_69b4a3d9377481909bc0392a1176601b completed March 13, 2026, 11:55 p.m.
Created at: March 8, 2026, 3:15 p.m.