Sudbury Reservoir
E848568
The Sudbury Reservoir is a large man-made drinking water reservoir in Massachusetts that serves as part of the greater Boston area's public water supply system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sudbury Reservoir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10146539 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Sudbury Reservoir Context triple: [Merrimack River watershed, containsWaterBody, Sudbury Reservoir]
-
A.
Norris Reservoir
Norris Reservoir is a large man-made lake in eastern Tennessee created by the Norris Dam on the Clinch River, popular for recreation, fishing, and hydroelectric power generation.
-
B.
Fells Reservoir
Fells Reservoir is a man-made water body in Massachusetts that serves as part of the regional water supply and recreational landscape within the Middlesex Fells Reservation.
-
C.
Bethany Reservoir
Bethany Reservoir is a man-made water storage facility in California that serves as a key forebay and regulating reservoir for the State Water Project’s South Bay Aqueduct.
-
D.
Williamsbridge Reservoir
Williamsbridge Reservoir was a former water storage facility in the Bronx, New York City, that played a key role in the borough’s 19th- and early 20th-century water supply system.
-
E.
Greenbooth Reservoir
Greenbooth Reservoir is a man-made lake near Norden in Greater Manchester, England, known for its scenic walking routes and surrounding moorland landscapes.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Sudbury Reservoir Target entity description: The Sudbury Reservoir is a large man-made drinking water reservoir in Massachusetts that serves as part of the greater Boston area's public water supply system.
-
A.
Norris Reservoir
Norris Reservoir is a large man-made lake in eastern Tennessee created by the Norris Dam on the Clinch River, popular for recreation, fishing, and hydroelectric power generation.
-
B.
Fells Reservoir
Fells Reservoir is a man-made water body in Massachusetts that serves as part of the regional water supply and recreational landscape within the Middlesex Fells Reservation.
-
C.
Bethany Reservoir
Bethany Reservoir is a man-made water storage facility in California that serves as a key forebay and regulating reservoir for the State Water Project’s South Bay Aqueduct.
-
D.
Williamsbridge Reservoir
Williamsbridge Reservoir was a former water storage facility in the Bronx, New York City, that played a key role in the borough’s 19th- and early 20th-century water supply system.
-
E.
Greenbooth Reservoir
Greenbooth Reservoir is a man-made lake near Norden in Greater Manchester, England, known for its scenic walking routes and surrounding moorland landscapes.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
drinking water reservoir
ⓘ
man-made reservoir ⓘ surface water body ⓘ |
| accessRestricted | true ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| createdBy |
construction of dams and dikes
ⓘ
impoundment of local rivers and streams ⓘ |
| environmentalConcern | protection of water quality ⓘ |
| hasFunction |
flood control support
ⓘ
public water supply ⓘ water storage ⓘ |
| hasProtectionStatus | protected drinking water supply area ⓘ |
| hasShorelineUse |
conservation land
ⓘ
limited passive recreation ⓘ |
| isPartOfSystem | Metropolitan Boston water system NERFINISHED ⓘ |
| locatedIn |
Massachusetts
ⓘ
Middlesex County, Massachusetts ⓘ Worcester County, Massachusetts NERFINISHED ⓘ |
| locatedInOrNear |
Framingham, Massachusetts
NERFINISHED
ⓘ
Marlborough, Massachusetts NERFINISHED ⓘ Southborough, Massachusetts NERFINISHED ⓘ Westborough, Massachusetts NERFINISHED ⓘ |
| managedBy | Massachusetts Water Resources Authority NERFINISHED ⓘ |
| nearbyCity |
Boston, Massachusetts
NERFINISHED
ⓘ
Worcester, Massachusetts NERFINISHED ⓘ |
| nearbyInfrastructure |
Interstate 90 (Massachusetts Turnpike)
NERFINISHED
ⓘ
Massachusetts Route 9 NERFINISHED ⓘ |
| ownedBy | Commonwealth of Massachusetts NERFINISHED ⓘ |
| partOf |
Greater Boston water supply system
NERFINISHED
ⓘ
Massachusetts public water supply system NERFINISHED ⓘ |
| primaryUse | drinking water supply ⓘ |
| recreationRestrictions |
limited shoreline access
ⓘ
no boating without authorization ⓘ no swimming ⓘ |
| region | New England NERFINISHED ⓘ |
| servesCity | Boston, Massachusetts NERFINISHED ⓘ |
| servesRegion | eastern Massachusetts NERFINISHED ⓘ |
| state | Massachusetts ⓘ |
| subjectToRegulationBy |
Massachusetts Department of Conservation and Recreation
NERFINISHED
ⓘ
Massachusetts Department of Environmental Protection NERFINISHED ⓘ |
| use |
backup water supply
ⓘ
emergency water supply ⓘ |
| waterSourceFor |
Greater Boston area
NERFINISHED
ⓘ
Metropolitan Boston communities ⓘ |
| waterType | freshwater ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Sudbury Reservoir Description of subject: The Sudbury Reservoir is a large man-made drinking water reservoir in Massachusetts that serves as part of the greater Boston area's public water supply system.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.