Triple

T7197110

Position	Surface form	Disambiguated ID	Type / Status
Subject	Fells Reservoir	`E168642`	entity
Predicate	partOf	`P40`	FINISHED
Object	Middlesex Fells Reservation water system The Middlesex Fells Reservation water system is a network of reservoirs and related infrastructure in Massachusetts that historically supplied drinking water and now supports recreation and conservation within the Middlesex Fells Reservation.	`E648205`	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: Middlesex Fells Reservation water system | Statement: [Fells Reservoir, partOf, Middlesex Fells Reservation water system]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Middlesex Fells Reservation water system
Context triple: [Fells Reservoir, partOf, Middlesex Fells Reservation water system]

A. Massachusetts Water Resources Authority
The Massachusetts Water Resources Authority is a public agency responsible for providing wholesale water and sewer services, including drinking water supply and wastewater treatment, to communities in the Greater Boston area.
B. 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.
C. 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.
D. 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.
E. Fairfax Water
Fairfax Water is a major public water utility in Northern Virginia that supplies drinking water to residents and businesses in Fairfax County and surrounding areas.
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: Middlesex Fells Reservation water system
Triple: [Fells Reservoir, partOf, Middlesex Fells Reservation water system]

Generated description

The Middlesex Fells Reservation water system is a network of reservoirs and related infrastructure in Massachusetts that historically supplied drinking water and now supports recreation and conservation within the Middlesex Fells Reservation.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Middlesex Fells Reservation water system
Target entity description: The Middlesex Fells Reservation water system is a network of reservoirs and related infrastructure in Massachusetts that historically supplied drinking water and now supports recreation and conservation within the Middlesex Fells Reservation.

A. Massachusetts Water Resources Authority
The Massachusetts Water Resources Authority is a public agency responsible for providing wholesale water and sewer services, including drinking water supply and wastewater treatment, to communities in the Greater Boston area.
B. 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.
C. 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.
D. 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.
E. Fairfax Water
Fairfax Water is a major public water utility in Northern Virginia that supplies drinking water to residents and businesses in Fairfax County and surrounding areas.
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_69c68a5376748190bb500f03df86e93e`	completed	March 27, 2026, 1:46 p.m.
NER	Named-entity recognition	`batch_69c6e928ecdc8190a7f3feaf6d28781b`	completed	March 27, 2026, 8:31 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69c7bfa6be648190950f682eaaeb1a18`	completed	March 28, 2026, 11:46 a.m.
NEDg	Description generation	`batch_69c7c01e84388190858d34a6a047bf63`	completed	March 28, 2026, 11:48 a.m.
NED2	Entity disambiguation (via description)	`batch_69c7c0a9eb0c819080cda73d67e84fe9`	completed	March 28, 2026, 11:51 a.m.

Created at: March 27, 2026, 2:51 p.m.