Alajuela Lake
E781954
Alajuela Lake is a major artificial reservoir in central Panama that serves as a key water source for the Panama Canal and surrounding communities.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Alajuela Lake canonical | 2 |
| Alajuela Lake watershed | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9174930 — 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: Alajuela Lake Context triple: [Chagres River, suppliesWaterTo, Alajuela Lake]
-
A.
Laguna de Apoyeque
Laguna de Apoyeque is a volcanic crater lake in Nicaragua formed within the Apoyeque volcano on the Chiltepe Peninsula.
-
B.
Lake Arenal
Lake Arenal is Costa Rica’s largest and most famous lake, known for its scenic views of Arenal Volcano and its popularity for windsurfing, fishing, and eco-tourism.
-
C.
Lake Zirahuén
Lake Zirahuén is a scenic, high-altitude freshwater lake in Michoacán, Mexico, known for its clear waters, surrounding pine forests, and growing ecotourism activities.
-
D.
Lake Petén Itzá
Lake Petén Itzá is a large, scenic lake in northern Guatemala known for its nearby Maya archaeological sites and the island city of Flores.
-
E.
Bayano Lake
Bayano Lake is one of Panama’s largest artificial lakes, created by damming the Bayano River and known for its surrounding rainforest and cave systems.
- 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: Alajuela Lake Target entity description: Alajuela Lake is a major artificial reservoir in central Panama that serves as a key water source for the Panama Canal and surrounding communities.
-
A.
Laguna de Apoyeque
Laguna de Apoyeque is a volcanic crater lake in Nicaragua formed within the Apoyeque volcano on the Chiltepe Peninsula.
-
B.
Lake Arenal
Lake Arenal is Costa Rica’s largest and most famous lake, known for its scenic views of Arenal Volcano and its popularity for windsurfing, fishing, and eco-tourism.
-
C.
Lake Zirahuén
Lake Zirahuén is a scenic, high-altitude freshwater lake in Michoacán, Mexico, known for its clear waters, surrounding pine forests, and growing ecotourism activities.
-
D.
Lake Petén Itzá
Lake Petén Itzá is a large, scenic lake in northern Guatemala known for its nearby Maya archaeological sites and the island city of Flores.
-
E.
Bayano Lake
Bayano Lake is one of Panama’s largest artificial lakes, created by damming the Bayano River and known for its surrounding rainforest and cave systems.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | reservoir ⓘ |
| basinCountry | Panama NERFINISHED ⓘ |
| country | Panama ⓘ |
| createdBy | Madden Dam NERFINISHED ⓘ |
| formerlyKnownAs | Madden Lake NERFINISHED ⓘ |
| function |
regulation of water levels for Panama Canal
ⓘ
storage of freshwater ⓘ |
| hasRole | key water reserve during dry season for Panama Canal operations ⓘ |
| hasType | freshwater lake ⓘ |
| inflow | Chagres River NERFINISHED ⓘ |
| isMajorComponentOf | Panama Canal watershed management system NERFINISHED ⓘ |
| locatedIn |
Panama Canal watershed
NERFINISHED
ⓘ
central Panama ⓘ |
| locatedInAdministrativeEntity | Panamá Province NERFINISHED ⓘ |
| locatedNear |
Gatun Lake
NERFINISHED
ⓘ
Panama City NERFINISHED ⓘ |
| locatedOnRiver | Chagres River NERFINISHED ⓘ |
| namedAfter | city of Alajuela in Costa Rica ⓘ |
| outflow | Chagres River NERFINISHED ⓘ |
| partOf |
Chagres River basin
NERFINISHED
ⓘ
Panama Canal water system NERFINISHED ⓘ |
| use |
drinking water supply
ⓘ
flood control ⓘ hydroelectric power generation ⓘ recreation ⓘ water supply for Panama Canal ⓘ |
| waterSourceFor |
Panama Canal locks
NERFINISHED
ⓘ
Panama City metropolitan area NERFINISHED ⓘ surrounding communities in central Panama ⓘ |
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: Alajuela Lake Description of subject: Alajuela Lake is a major artificial reservoir in central Panama that serves as a key water source for the Panama Canal and surrounding communities.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Alajuela Lake watershed