Lake Decatur
E410215
Lake Decatur is a large man-made reservoir in central Illinois that serves as a primary water supply and recreational area for the city of Decatur.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lake Decatur canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3528023 — 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: Lake Decatur Context triple: [Decatur, Illinois, locatedOnWaterbody, Lake Decatur]
-
A.
Crowley Lake
Crowley Lake is a large man-made reservoir in California’s eastern Sierra Nevada, popular for fishing, boating, and its striking volcanic rock formations along the shoreline.
-
B.
Lake Wilcox
Lake Wilcox is a kettle lake in Richmond Hill, Ontario, known as a popular local spot for recreation, nature viewing, and waterfront parks.
-
C.
Lake Martin
Lake Martin is a large, man-made reservoir in central Alabama known for its scenic shoreline, recreational boating, and lakeside communities.
-
D.
Lake Eufaula
Lake Eufaula is a large reservoir on the Chattahoochee River along the Alabama–Georgia border, popular for fishing, boating, and other recreational activities.
-
E.
Lake Tiscapa
Lake Tiscapa is a volcanic crater lake in Managua, Nicaragua, historically significant as a scenic landmark and former site of presidential residences.
- 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: Lake Decatur Target entity description: Lake Decatur is a large man-made reservoir in central Illinois that serves as a primary water supply and recreational area for the city of Decatur.
-
A.
Crowley Lake
Crowley Lake is a large man-made reservoir in California’s eastern Sierra Nevada, popular for fishing, boating, and its striking volcanic rock formations along the shoreline.
-
B.
Lake Wilcox
Lake Wilcox is a kettle lake in Richmond Hill, Ontario, known as a popular local spot for recreation, nature viewing, and waterfront parks.
-
C.
Lake Martin
Lake Martin is a large, man-made reservoir in central Alabama known for its scenic shoreline, recreational boating, and lakeside communities.
-
D.
Lake Eufaula
Lake Eufaula is a large reservoir on the Chattahoochee River along the Alabama–Georgia border, popular for fishing, boating, and other recreational activities.
-
E.
Lake Tiscapa
Lake Tiscapa is a volcanic crater lake in Managua, Nicaragua, historically significant as a scenic landmark and former site of presidential residences.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
man-made lake
ⓘ
reservoir ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| createdByDamming | Sangamon River ⓘ |
| hasActivity |
birdwatching
ⓘ
picnicking ⓘ sailing ⓘ water skiing ⓘ |
| hasEcosystemType | freshwater lake ⓘ |
| hasFunction |
drinking water source
ⓘ
flood control ⓘ industrial water supply ⓘ recreational area ⓘ |
| hasNearbyAirport | Decatur Airport ⓘ |
| hasNearbyHighway |
Illinois Route 48
ⓘ
Interstate 72 NERFINISHED ⓘ U.S. Route 36 NERFINISHED ⓘ |
| hasNearbyPark |
Faries Park
NERFINISHED
ⓘ
Nelson Park NERFINISHED ⓘ |
| hasShorelineCity | Decatur, Illinois ONNED1 ⓘ |
| hasType | surface water reservoir ⓘ |
| inflow | Sangamon River ⓘ |
| isArtificial | true ⓘ |
| isPartOf | water supply system of Decatur, Illinois ⓘ |
| isRecreationalAreaFor |
Decatur, Illinois
ⓘ
surface form:
Decatur metropolitan area
Macon County residents ⓘ |
| locatedIn |
Illinois
ⓘ
Macon County, Illinois NERFINISHED ⓘ Central Illinois ⓘ
surface form:
central Illinois
|
| locatedInTimeZone | Central Time Zone ⓘ |
| locatedInWatershed |
Illinois River basin
ⓘ
Sangamon River watershed ⓘ |
| locatedNear | Decatur, Illinois ⓘ |
| operator | City of Decatur ⓘ |
| outflow | Sangamon River ⓘ |
| owner | City of Decatur ⓘ |
| primaryCityServed | Decatur, Illinois ⓘ |
| region | Midwestern United States ⓘ |
| use |
boating
ⓘ
fishing ⓘ municipal water supply ⓘ recreation ⓘ wildlife habitat ⓘ |
| waterBodyType | reservoir ⓘ |
| waterSupplyFor | Decatur, Illinois ⓘ |
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: Lake Decatur Description of subject: Lake Decatur is a large man-made reservoir in central Illinois that serves as a primary water supply and recreational area for the city of Decatur.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.