Middle Reservoir
E253839
Middle Reservoir is a man-made lake within the Middlesex Fells Reservation in Massachusetts, used primarily for water supply and recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Middle Reservoir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2300424 — 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: Middle Reservoir Context triple: [Middlesex Fells Reservation, hasBodyOfWater, Middle Reservoir]
-
A.
Middle Branch Reservoir
Middle Branch Reservoir is a man-made lake in New York’s Croton Watershed that serves as part of the New York City water supply system.
-
B.
Yellowtail Reservoir
Yellowtail Reservoir is a man-made lake on the Bighorn River in Montana, created by Yellowtail Dam and used primarily for water storage, hydroelectric power, and recreation.
-
C.
Little River Reservoir
Little River Reservoir is a man-made lake in Durham County, North Carolina, primarily serving as a municipal water supply and recreational area.
-
D.
Greenfield Reservoir
Greenfield Reservoir is a man-made water reservoir in the Saddleworth area of Greater Manchester, England, forming part of the network of upland reservoirs in the Peak District.
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E.
East Branch Reservoir
East Branch Reservoir is a man-made water supply reservoir in New York’s Croton Watershed that helps provide drinking water to New York City.
- 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: Middle Reservoir Target entity description: Middle Reservoir is a man-made lake within the Middlesex Fells Reservation in Massachusetts, used primarily for water supply and recreation.
-
A.
Middle Branch Reservoir
Middle Branch Reservoir is a man-made lake in New York’s Croton Watershed that serves as part of the New York City water supply system.
-
B.
Yellowtail Reservoir
Yellowtail Reservoir is a man-made lake on the Bighorn River in Montana, created by Yellowtail Dam and used primarily for water storage, hydroelectric power, and recreation.
-
C.
Little River Reservoir
Little River Reservoir is a man-made lake in Durham County, North Carolina, primarily serving as a municipal water supply and recreational area.
-
D.
Greenfield Reservoir
Greenfield Reservoir is a man-made water reservoir in the Saddleworth area of Greater Manchester, England, forming part of the network of upland reservoirs in the Peak District.
-
E.
East Branch Reservoir
East Branch Reservoir is a man-made water supply reservoir in New York’s Croton Watershed that helps provide drinking water to New York City.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
body of water
ⓘ
man-made lake ⓘ reservoir ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| hasRecreationalActivity |
trail walking
ⓘ
wildlife observation ⓘ |
| hasShorelineFeature | forested shoreline ⓘ |
| locatedIn |
Greater Boston
ⓘ
surface form:
Greater Boston area
Middlesex County, Massachusetts ⓘ Middlesex Fells Reservation ⓘ |
| locatedNear |
Medford, Massachusetts
ⓘ
Stoneham, Massachusetts ⓘ Winchester, Massachusetts ⓘ |
| managedBy | Massachusetts Department of Conservation and Recreation ⓘ |
| manMade | true ⓘ |
| partOf |
Middlesex Fells Reservation water system
ⓘ
surface form:
Middlesex Fells Reservation water supply system
|
| primaryUse | water supply ⓘ |
| region | New England ⓘ |
| state | Massachusetts ⓘ |
| use |
fishing
ⓘ
hiking access ⓘ recreation ⓘ |
| waterType | freshwater ⓘ |
| withinProtectedArea | Middlesex Fells Reservation ⓘ |
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: Middle Reservoir Description of subject: Middle Reservoir is a man-made lake within the Middlesex Fells Reservation in Massachusetts, used primarily for water supply and recreation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.