Triple

T10146540
Position Surface form Disambiguated ID Type / Status
Subject Merrimack River watershed E231719 entity
Predicate containsWaterBody P1778 FINISHED
Object Foss Reservoir (Sudbury River)
Foss Reservoir (Sudbury River) is a man-made water storage reservoir on the Sudbury River in Massachusetts that forms part of the larger Merrimack River watershed system.
 E844018 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: Foss Reservoir (Sudbury River) | Statement: [Merrimack River watershed, containsWaterBody, Foss Reservoir (Sudbury River)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Foss Reservoir (Sudbury River)
Context triple: [Merrimack River watershed, containsWaterBody, Foss Reservoir (Sudbury River)]
  • A. Scituate Reservoir
    Scituate Reservoir is the largest freshwater body in Rhode Island and the primary drinking water source for the city of Providence and several surrounding communities.
  • B. Wachusett Reservoir
    Wachusett Reservoir is a large man-made lake in central Massachusetts that serves as a major drinking water supply for the Greater Boston area.
  • C. Malden Reservoir
    Malden Reservoir is a man-made water body in Massachusetts that serves as a local water supply and recreational resource within the greater Boston area.
  • D. Aspetuck Reservoir
    Aspetuck Reservoir is a man-made water body in Fairfield County, Connecticut, serving as a local water supply and recreational area within the town of Easton.
  • E. Quabbin Reservoir
    Quabbin Reservoir is a large man-made lake in central Massachusetts that serves as one of the primary drinking water sources for the Boston metropolitan area and is surrounded by protected forest and wildlife habitat.
  • 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: Foss Reservoir (Sudbury River)
Triple: [Merrimack River watershed, containsWaterBody, Foss Reservoir (Sudbury River)]
Generated description
Foss Reservoir (Sudbury River) is a man-made water storage reservoir on the Sudbury River in Massachusetts that forms part of the larger Merrimack River watershed system.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Foss Reservoir (Sudbury River)
Target entity description: Foss Reservoir (Sudbury River) is a man-made water storage reservoir on the Sudbury River in Massachusetts that forms part of the larger Merrimack River watershed system.
  • A. Scituate Reservoir
    Scituate Reservoir is the largest freshwater body in Rhode Island and the primary drinking water source for the city of Providence and several surrounding communities.
  • B. Wachusett Reservoir
    Wachusett Reservoir is a large man-made lake in central Massachusetts that serves as a major drinking water supply for the Greater Boston area.
  • C. Malden Reservoir
    Malden Reservoir is a man-made water body in Massachusetts that serves as a local water supply and recreational resource within the greater Boston area.
  • D. Aspetuck Reservoir
    Aspetuck Reservoir is a man-made water body in Fairfield County, Connecticut, serving as a local water supply and recreational area within the town of Easton.
  • E. Quabbin Reservoir
    Quabbin Reservoir is a large man-made lake in central Massachusetts that serves as one of the primary drinking water sources for the Boston metropolitan area and is surrounded by protected forest and wildlife habitat.
  • 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_69ca848364f881908a24366a6feec1db completed March 30, 2026, 2:11 p.m.
NER Named-entity recognition batch_69cdebffb7688190b5def02f72154b14 completed April 2, 2026, 4:09 a.m.
NED1 Entity disambiguation (via context triple) batch_69d2e62236c88190a6ddaf4957cb8b5f completed April 5, 2026, 10:45 p.m.
NEDg Description generation batch_69d2e73fd6988190a338a9e49dc3671b completed April 5, 2026, 10:50 p.m.
NED2 Entity disambiguation (via description) batch_69d2e8c9058c8190bfa5720397331fa1 completed April 5, 2026, 10:57 p.m.
Created at: March 30, 2026, 9:07 p.m.