Triple

T394918
Position Surface form Disambiguated ID Type / Status
Subject Portland Water Bureau E8961 entity
Predicate usesWaterSource P4102 FINISHED
Object Columbia South Shore Well Field
The Columbia South Shore Well Field is a major groundwater supply system that provides drinking water to the Portland, Oregon metropolitan area, particularly as a backup and supplemental source to the city’s primary surface water.
 E49796 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: Columbia South Shore Well Field | Statement: [Portland Water Bureau, usesWaterSource, Columbia South Shore Well Field]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Columbia South Shore Well Field
Context triple: [Portland Water Bureau, usesWaterSource, Columbia South Shore Well Field]
  • A. New Croton Reservoir
    The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
  • B. Middle Branch Reservoir
    Middle Branch Reservoir is a man-made lake in New York’s Croton Watershed that serves as part of the New York City water supply system.
  • C. East Branch Reservoir
    East Branch Reservoir is a man-made water supply reservoir in New York’s Croton Watershed that helps provide drinking water to New York City.
  • D. Titicus Reservoir
    Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for New York City.
  • E. Croton Falls Reservoir
    Croton Falls Reservoir is a man-made lake in Westchester County, New York, that serves as part of New York City's Croton water supply system.
  • 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: Columbia South Shore Well Field
Triple: [Portland Water Bureau, usesWaterSource, Columbia South Shore Well Field]
Generated description
The Columbia South Shore Well Field is a major groundwater supply system that provides drinking water to the Portland, Oregon metropolitan area, particularly as a backup and supplemental source to the city’s primary surface water.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Columbia South Shore Well Field
Target entity description: The Columbia South Shore Well Field is a major groundwater supply system that provides drinking water to the Portland, Oregon metropolitan area, particularly as a backup and supplemental source to the city’s primary surface water.
  • A. New Croton Reservoir
    The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
  • B. Middle Branch Reservoir
    Middle Branch Reservoir is a man-made lake in New York’s Croton Watershed that serves as part of the New York City water supply system.
  • C. East Branch Reservoir
    East Branch Reservoir is a man-made water supply reservoir in New York’s Croton Watershed that helps provide drinking water to New York City.
  • D. Titicus Reservoir
    Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for New York City.
  • E. Croton Falls Reservoir
    Croton Falls Reservoir is a man-made lake in Westchester County, New York, that serves as part of New York City's Croton water supply system.
  • 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_69a2e7f55c60819097aff65ea2ca2832 completed Feb. 28, 2026, 1:04 p.m.
NER Named-entity recognition batch_69a2ee2c2d1881909aa1ccfaa4172b38 completed Feb. 28, 2026, 1:31 p.m.
NED1 Entity disambiguation (via context triple) batch_69a405fa43448190b3e78d83e791b105 completed March 1, 2026, 9:25 a.m.
NEDg Description generation batch_69a4070f76308190bd898dcdb27f3277 completed March 1, 2026, 9:29 a.m.
NED2 Entity disambiguation (via description) batch_69a40794523081908839f90446beba83 completed March 1, 2026, 9:32 a.m.
Created at: Feb. 28, 2026, 1:08 p.m.