Malden Reservoir
E168641
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Malden Reservoir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1424943 — 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: Malden Reservoir Context triple: [Mystic River watershed, contains, Malden Reservoir]
-
A.
Union Valley Reservoir
Union Valley Reservoir is a large man-made lake in California’s Sierra Nevada used for recreation and hydroelectric power within Eldorado National Forest.
-
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.
Ashokan Reservoir
Ashokan Reservoir is a major New York City water supply reservoir located in the Catskill Mountains of Ulster County, New York.
-
D.
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.
-
E.
Titicus Reservoir
Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for 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: Malden Reservoir Target entity description: 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.
-
A.
Union Valley Reservoir
Union Valley Reservoir is a large man-made lake in California’s Sierra Nevada used for recreation and hydroelectric power within Eldorado National Forest.
-
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.
Ashokan Reservoir
Ashokan Reservoir is a major New York City water supply reservoir located in the Catskill Mountains of Ulster County, New York.
-
D.
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.
-
E.
Titicus Reservoir
Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for New York City.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
man-made lake
ⓘ
reservoir ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| country |
United States
ⓘ
linked to:
United States of America
|
| hasActivity |
fishing
ⓘ
outdoor recreation ⓘ walking ⓘ |
| hasEnvironmentalRole | local habitat for wildlife ⓘ |
| hasFunction |
drinking water source
ⓘ
recreational resource ⓘ |
| hasShoreFeature | shoreline ⓘ |
| locatedIn |
Greater Boston
ⓘ
Massachusetts ⓘ Middlesex County, Massachusetts ⓘ |
| locatedInTimeZone | Eastern Time Zone ⓘ |
| locatedNear |
Boston, Massachusetts
ⓘ
Malden, Massachusetts ⓘ |
| origin | artificial ⓘ |
| partOf | Greater Boston water resources ⓘ |
| region | New England ⓘ |
| state | Massachusetts ⓘ |
| use |
local water supply
ⓘ
municipal water supply ⓘ recreation ⓘ |
| 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: Malden Reservoir Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.