Lake Bolsena
E67989
Lake Bolsena is a large volcanic crater lake in central Italy, renowned for its clear waters, scenic surroundings, and historical lakeside towns.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Lake Bolsena canonical | 17 |
| Bolsena | 2 |
| Lake Bolsena (nearby) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T540422 — 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 Bolsena Context triple: [Lazio, containsLake, Lake Bolsena]
-
A.
Lake Bracciano
Lake Bracciano is a large volcanic lake in central Italy, northwest of Rome, known for its clear waters, scenic surroundings, and role as a major source of the capital’s drinking water.
-
B.
Lake Como, Italy
Lake Como, Italy is a picturesque glacial lake in northern Italy renowned for its dramatic alpine scenery, historic villas, and status as a luxury retreat for celebrities and travelers.
-
C.
Lake Jacomo
Lake Jacomo is a large recreational reservoir in Jackson County, Missouri, popular for boating, fishing, and outdoor activities within the Fleming Park area.
-
D.
Lake Velence
Lake Velence is one of Hungary’s largest natural lakes, known as a popular resort and recreation area in the Transdanubian region.
-
E.
Lake Managua
Lake Managua is a large freshwater lake in western Nicaragua, notable for bordering the capital city of Managua and being one of Central America’s major inland water bodies.
- 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 Bolsena Target entity description: Lake Bolsena is a large volcanic crater lake in central Italy, renowned for its clear waters, scenic surroundings, and historical lakeside towns.
-
A.
Lake Bracciano
Lake Bracciano is a large volcanic lake in central Italy, northwest of Rome, known for its clear waters, scenic surroundings, and role as a major source of the capital’s drinking water.
-
B.
Lake Como, Italy
Lake Como, Italy is a picturesque glacial lake in northern Italy renowned for its dramatic alpine scenery, historic villas, and status as a luxury retreat for celebrities and travelers.
-
C.
Lake Jacomo
Lake Jacomo is a large recreational reservoir in Jackson County, Missouri, popular for boating, fishing, and outdoor activities within the Fleming Park area.
-
D.
Lake Velence
Lake Velence is one of Hungary’s largest natural lakes, known as a popular resort and recreation area in the Transdanubian region.
-
E.
Lake Managua
Lake Managua is a large freshwater lake in western Nicaragua, notable for bordering the capital city of Managua and being one of Central America’s major inland water bodies.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
lake
ⓘ
volcanic crater lake ⓘ |
| basinCountry | Italy ⓘ |
| climate | Mediterranean climate ⓘ |
| country | Italy ⓘ |
| culturalSignificance |
associated with Catholic Eucharistic traditions
ⓘ
site of medieval pilgrimages ⓘ |
| drainsInto | Tyrrhenian Sea ⓘ |
| elevationAboveSeaLevel | about 305 meters ⓘ |
| formationPeriod | Quaternary period ⓘ |
| formedBy | volcanic activity ⓘ |
| geologicalOrigin | caldera collapse ⓘ |
| hasCoastlineFeature | black volcanic sand beaches ⓘ |
| hasEcologicalCharacteristic |
aquatic biodiversity
ⓘ
relatively unpolluted waters ⓘ rich birdlife ⓘ |
| hasIsland |
Bisentina Island
ⓘ
Martana Island ⓘ |
| hasShore |
Lake Bolsena
self-linksurface differs
ⓘ
surface form:
Bolsena
Capodimonte ⓘ Gradoli ⓘ Grotte di Castro ⓘ Marta ⓘ Montefiascone ⓘ |
| knownFor |
clear waters
ⓘ
historical lakeside towns ⓘ scenic surroundings ⓘ |
| locatedIn |
Lazio
ⓘ
central Italy ⓘ |
| locatedInAdministrativeTerritory | Province of Viterbo ⓘ |
| locatedInCraterOf |
Vulsini volcanic complex
ⓘ
surface form:
Vulsini volcano
|
| locatedNorthOf | Rome ⓘ |
| locatedOn | Vulsini volcanic complex ⓘ |
| maximumDepth | about 151 meters ⓘ |
| near |
Orvieto
ⓘ
Via Francigena ⓘ |
| outflow | Marta River ⓘ |
| partOf | Italian Peninsula ⓘ |
| recreationalActivity |
boating
ⓘ
fishing ⓘ sailing ⓘ swimming ⓘ |
| region |
Latium Adiectum
ⓘ
surface form:
Tuscia
|
| shape | roughly circular ⓘ |
| surfaceArea | about 113 square kilometers ⓘ |
| tourismType |
cultural tourism
ⓘ
nature tourism ⓘ religious tourism ⓘ |
| 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: Lake Bolsena Description of subject: Lake Bolsena is a large volcanic crater lake in central Italy, renowned for its clear waters, scenic surroundings, and historical lakeside towns.
Referenced by (20)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Bolsena
this entity surface form:
Bolsena
subject surface form:
Lazio