Foss Reservoir (Sudbury River)
E844018
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Foss Reservoir (Sudbury River) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10146540 — 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: 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.
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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.
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
Statements (24)
| Predicate | Object |
|---|---|
| instanceOf | reservoir ⓘ |
| artificial | true ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| hasInflow | Sudbury River NERFINISHED ⓘ |
| hasOutflow | Sudbury River NERFINISHED ⓘ |
| hydrologicalSystem | Merrimack River basin NERFINISHED ⓘ |
| isPartOfRiverSystem | Merrimack River system NERFINISHED ⓘ |
| locatedIn |
Massachusetts
ⓘ
Sudbury River NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
| locatedInWatershed |
Merrimack River watershed
ⓘ
Sudbury River watershed NERFINISHED ⓘ |
| partOf |
Merrimack River watershed
ⓘ
Sudbury River reservoir system NERFINISHED ⓘ |
| region | New England NERFINISHED ⓘ |
| state | Massachusetts ⓘ |
| use |
water storage
ⓘ
water supply ⓘ |
| waterBodyType | surface water reservoir ⓘ |
| watercourse | Sudbury River NERFINISHED ⓘ |
| waterManagementFunction |
flow regulation
ⓘ
storage for municipal supply ⓘ |
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: Foss Reservoir (Sudbury River) Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.