Triple

T19960696
Position Surface form Disambiguated ID Type / Status
Subject Cosgrove Tunnel E479804 entity
Predicate endPoint P390 FINISHED
Object MetroWest Water Supply Tunnel system
The MetroWest Water Supply Tunnel system is a major underground aqueduct in Massachusetts that delivers drinking water from the Quabbin and Wachusett Reservoirs to the Greater Boston area.
 E1403672 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: MetroWest Water Supply Tunnel system | Statement: [Cosgrove Tunnel, endPoint, MetroWest Water Supply Tunnel system]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: MetroWest Water Supply Tunnel system
Context triple: [Cosgrove Tunnel, endPoint, MetroWest Water Supply Tunnel system]
  • A. Massachusetts Bay Outfall Tunnel
    The Massachusetts Bay Outfall Tunnel is a major deep-rock wastewater discharge tunnel off the coast of Boston that carries treated effluent far offshore to reduce pollution in Boston Harbor and Massachusetts Bay.
  • B. North Bay Aqueduct
    The North Bay Aqueduct is a key water conveyance facility in California that delivers State Water Project supplies to communities in Solano and Napa counties.
  • C. South Bay Aqueduct
    South Bay Aqueduct is a major California water conveyance facility that transports water from the State Water Project to communities in the southern San Francisco Bay Area.
  • D. New York City Water Tunnel No. 3
    New York City Water Tunnel No. 3 is a massive, long-term infrastructure project designed to modernize and provide redundancy to New York City’s drinking water distribution network.
  • E. Central Artery/Tunnel Project
    The Central Artery/Tunnel Project, commonly known as the "Big Dig," was a massive Boston infrastructure megaproject that rerouted the city’s central highway into tunnels to reduce congestion and reclaim urban space.
  • 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: MetroWest Water Supply Tunnel system
Triple: [Cosgrove Tunnel, endPoint, MetroWest Water Supply Tunnel system]
Generated description
The MetroWest Water Supply Tunnel system is a major underground aqueduct in Massachusetts that delivers drinking water from the Quabbin and Wachusett Reservoirs to the Greater Boston area.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: MetroWest Water Supply Tunnel system
Target entity description: The MetroWest Water Supply Tunnel system is a major underground aqueduct in Massachusetts that delivers drinking water from the Quabbin and Wachusett Reservoirs to the Greater Boston area.
  • A. Massachusetts Bay Outfall Tunnel
    The Massachusetts Bay Outfall Tunnel is a major deep-rock wastewater discharge tunnel off the coast of Boston that carries treated effluent far offshore to reduce pollution in Boston Harbor and Massachusetts Bay.
  • B. North Bay Aqueduct
    The North Bay Aqueduct is a key water conveyance facility in California that delivers State Water Project supplies to communities in Solano and Napa counties.
  • C. South Bay Aqueduct
    South Bay Aqueduct is a major California water conveyance facility that transports water from the State Water Project to communities in the southern San Francisco Bay Area.
  • D. New York City Water Tunnel No. 3
    New York City Water Tunnel No. 3 is a massive, long-term infrastructure project designed to modernize and provide redundancy to New York City’s drinking water distribution network.
  • E. Central Artery/Tunnel Project
    The Central Artery/Tunnel Project, commonly known as the "Big Dig," was a massive Boston infrastructure megaproject that rerouted the city’s central highway into tunnels to reduce congestion and reclaim urban space.
  • 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_69d8e523c19881909f9197037200dde6 completed April 10, 2026, 11:55 a.m.
NER Named-entity recognition batch_69e65af4520c81909986a47289ba801e completed April 20, 2026, 4:57 p.m.
NED1 Entity disambiguation (via context triple) batch_6a07fdccdf408190b0d1130b82e9bfb2 completed May 16, 2026, 5:17 a.m.
NEDg Description generation batch_6a07fea23a988190832115346f8889ca completed May 16, 2026, 5:20 a.m.
NED2 Entity disambiguation (via description) batch_6a07ff4a59608190a17f30f60c879efc completed May 16, 2026, 5:23 a.m.
Created at: April 10, 2026, 1:54 p.m.