Lake Arenal
E321029
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Lake Arenal canonical | 10 |
| Arenal Lake | 2 |
| Arenal Lake watershed | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3043015 — 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 Arenal Context triple: [Arenal, near, Lake Arenal]
-
A.
Arenal
Arenal is a prominent stratovolcano in northwestern Costa Rica, famed for its near-perfect conical shape and role as a major eco-tourism and geothermal energy site.
-
B.
Lake Atitlán
Lake Atitlán is a deep volcanic lake in the Guatemalan highlands, renowned for its dramatic surrounding volcanoes, traditional Mayan villages, and striking natural beauty.
-
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.
Villarrica Lake
Villarrica Lake is a large glacial lake in southern Chile, popular for tourism, water sports, and its scenic setting near the Villarrica Volcano.
-
E.
Poás
Poás is an active stratovolcano in central Costa Rica known for its large crater, acidic crater lake, and frequent eruptions.
- 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 Arenal Target entity description: 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.
-
A.
Arenal
Arenal is a prominent stratovolcano in northwestern Costa Rica, famed for its near-perfect conical shape and role as a major eco-tourism and geothermal energy site.
-
B.
Lake Atitlán
Lake Atitlán is a deep volcanic lake in the Guatemalan highlands, renowned for its dramatic surrounding volcanoes, traditional Mayan villages, and striking natural beauty.
-
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.
Villarrica Lake
Villarrica Lake is a large glacial lake in southern Chile, popular for tourism, water sports, and its scenic setting near the Villarrica Volcano.
-
E.
Poás
Poás is an active stratovolcano in central Costa Rica known for its large crater, acidic crater lake, and frequent eruptions.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
artificial lake
ⓘ
lake ⓘ reservoir ⓘ |
| basinCountry | Costa Rica ⓘ |
| bestSeasonForWindsurfing | November to April ⓘ |
| climate | tropical ⓘ |
| contributesTo | Costa Rica’s electricity supply ⓘ |
| country | Costa Rica ⓘ |
| createdBy | Arenal Dam ⓘ |
| elevationAboveSeaLevel | approximately 540 meters ⓘ |
| hasActivity |
birdwatching
ⓘ
kayaking ⓘ sailing ⓘ sport fishing ⓘ stand-up paddleboarding ⓘ |
| hasIsland | several small islands ⓘ |
| hasShorelineFeature |
forests
ⓘ
pastures ⓘ rolling hills ⓘ |
| inflow | Arenal River ⓘ |
| isLargestLakeIn | Costa Rica ⓘ |
| knownFor |
eco-tourism
ⓘ
fishing ⓘ hydroelectric power generation ⓘ scenic views of Arenal Volcano ⓘ windsurfing ⓘ |
| length | approximately 30 kilometers ⓘ |
| locatedIn |
Alajuela Province
ⓘ
Guanacaste Province ⓘ northern Costa Rica ⓘ |
| maximumDepth | approximately 60 meters ⓘ |
| nearbyCity |
La Fortuna
ⓘ
Tilarán ⓘ |
| nearbyInfrastructure | Arenal Dam ⓘ |
| nearbyProtectedArea |
Arenal Conservation Area
ⓘ
linked to:
Arenal Tilaran Conservation Area
Arenal Volcano National Park ⓘ |
| nearbyTown | Nuevo Arenal ⓘ |
| nearbyVolcano |
Arenal Volcano
ⓘ
linked to:
Arenal
|
| outflow | Arenal River ⓘ |
| popularFishSpecies |
rainbow bass
ⓘ
tilapia ⓘ |
| primaryUse | hydroelectricity production ⓘ |
| surfaceArea | approximately 85 square kilometers ⓘ |
| tourismType |
adventure tourism
ⓘ
eco-tourism destination ⓘ nature tourism ⓘ |
| windConditions | strong and consistent winds ⓘ |
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 Arenal Description of subject: 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.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Lake Arenal
linked to: Lake Arenal
linked to: Lake Arenal