Marta River
E488342
The Marta River is a watercourse in central Italy that drains Lake Bolsena and flows southwest toward the Tyrrhenian Sea.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Marta River canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T3242330 — 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: Marta River Context triple: [Lake Bolsena, outflow, Marta River]
-
A.
Pilcomayo River
The Pilcomayo River is a major South American river that flows from the Andes through Bolivia, Paraguay, and Argentina before joining the Paraná River.
-
B.
Zamora River
The Zamora River is a significant waterway in southern Ecuador that flows through the Andean and Amazonian regions, supporting local ecosystems and communities.
-
C.
Magé River
The Magé River is a watercourse in the state of Rio de Janeiro, Brazil, that flows through the municipality of Magé before emptying into Guanabara Bay.
-
D.
Sabor River
The Sabor River is a significant river in northeastern Portugal that flows through the Trás-os-Montes region before joining the Douro.
-
E.
Bermejo River
The Bermejo River is a major South American waterway flowing through Bolivia and Argentina before joining the Paraguay River and ultimately contributing to the Río de la Plata basin.
- 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: Marta River Target entity description: The Marta River is a watercourse in central Italy that drains Lake Bolsena and flows southwest toward the Tyrrhenian Sea.
-
A.
Pilcomayo River
The Pilcomayo River is a major South American river that flows from the Andes through Bolivia, Paraguay, and Argentina before joining the Paraná River.
-
B.
Zamora River
The Zamora River is a significant waterway in southern Ecuador that flows through the Andean and Amazonian regions, supporting local ecosystems and communities.
-
C.
Magé River
The Magé River is a watercourse in the state of Rio de Janeiro, Brazil, that flows through the municipality of Magé before emptying into Guanabara Bay.
-
D.
Sabor River
The Sabor River is a significant river in northeastern Portugal that flows through the Trás-os-Montes region before joining the Douro.
-
E.
Bermejo River
The Bermejo River is a major South American waterway flowing through Bolivia and Argentina before joining the Paraguay River and ultimately contributing to the Río de la Plata basin.
- F. None of above. chosen
Statements (20)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | Italy ⓘ |
| continent | Europe ⓘ |
| country | Italy ⓘ |
| crosses | Marta, Lazio ⓘ |
| drains | Lake Bolsena ⓘ |
| flowsDirection | southwest ⓘ |
| flowsInto | Tyrrhenian Sea ⓘ |
| hasMouthElevation | 0 metres above sea level ⓘ |
| hasMouthNear | Tarquinia ⓘ |
| hasSourceElevation | about 305 metres above sea level ⓘ |
| locatedIn | central Italy ⓘ |
| locatedInProvince | Province of Viterbo ⓘ |
| locatedInRegion | Lazio ⓘ |
| mouth | Tyrrhenian Sea ⓘ |
| namedAfter | town of Marta ⓘ |
| partOf |
Tyrrhenian Sea basin
ⓘ
linked to:
Tyrrhenian Sea
|
| regionHydrologyRole | primary outflow of Lake Bolsena ⓘ |
| source | Lake Bolsena ⓘ |
| watercourseType | emissary river ⓘ |
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: Marta River Description of subject: The Marta River is a watercourse in central Italy that drains Lake Bolsena and flows southwest toward the Tyrrhenian Sea.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.