Meycauayan River
E258206
Meycauayan River is a heavily polluted river in Bulacan, Philippines, known for flowing through industrial and residential areas before emptying into Manila Bay.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Meycauayan River canonical | 1 |
| Meycauayan–Marilao–Obando River Basin | 1 |
| Meycauayan–Marilao–Obando River System | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2264681 — 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: Meycauayan River Context triple: [Manila Bay, receivesRiver, Meycauayan River]
-
A.
Imus River
Imus River is a river in the province of Cavite in the Philippines that flows through several municipalities before emptying into Manila Bay.
-
B.
Pampanga River
The Pampanga River is a major river system in the Philippines that drains much of central Luzon, supporting extensive agriculture and communities along its floodplain.
-
C.
Cabanga
Cabanga is a coastal neighborhood and marina district in Recife, Brazil, known for its nautical activities and proximity to the city’s central area.
-
D.
Brenz River
The Brenz River is a tributary of the Danube in southern Germany that flows through the state of Baden-Württemberg, including the town of Heidenheim an der Brenz.
-
E.
Rhumel River
The Rhumel River is a river in northeastern Algeria that flows through the city of Constantine, carving its famous deep gorges and shaping the city’s dramatic landscape.
- 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: Meycauayan River Target entity description: Meycauayan River is a heavily polluted river in Bulacan, Philippines, known for flowing through industrial and residential areas before emptying into Manila Bay.
-
A.
Imus River
Imus River is a river in the province of Cavite in the Philippines that flows through several municipalities before emptying into Manila Bay.
-
B.
Pampanga River
The Pampanga River is a major river system in the Philippines that drains much of central Luzon, supporting extensive agriculture and communities along its floodplain.
-
C.
Cabanga
Cabanga is a coastal neighborhood and marina district in Recife, Brazil, known for its nautical activities and proximity to the city’s central area.
-
D.
Brenz River
The Brenz River is a tributary of the Danube in southern Germany that flows through the state of Baden-Württemberg, including the town of Heidenheim an der Brenz.
-
E.
Rhumel River
The Rhumel River is a river in northeastern Algeria that flows through the city of Constantine, carving its famous deep gorges and shaping the city’s dramatic landscape.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| affects |
fisheries in Manila Bay
ⓘ
health of nearby communities ⓘ water quality in Manila Bay ⓘ |
| country | Philippines ⓘ |
| drainageBasin |
Meycauayan River
self-linksurface differs
ⓘ
surface form:
Meycauayan–Marilao–Obando River Basin
|
| environmentalIssue |
heavy metal contamination
ⓘ
solid waste pollution ⓘ water contamination ⓘ |
| flowsInto | Manila Bay ⓘ |
| hasEcologicalImpact |
degradation of aquatic habitats
ⓘ
loss of biodiversity ⓘ |
| hasMouthLocation | coastal area of Bulacan facing Manila Bay ⓘ |
| hasPollutionSource |
electroplating facilities
ⓘ
gold smelting operations ⓘ household sewage ⓘ solid waste dumping ⓘ tanneries ⓘ |
| hasRisk | exposure of residents to toxic substances ⓘ |
| hasType | lowland river ⓘ |
| hasUse |
fishing (reduced due to pollution)
ⓘ
local transportation (historically) ⓘ |
| includedIn | Blacksmith Institute list of world’s worst polluted places ⓘ |
| knownFor |
heavy pollution
ⓘ
industrial pollution ⓘ residential wastewater pollution ⓘ |
| locatedIn |
Bulacan
ⓘ
Central Luzon ⓘ Luzon ⓘ Marilao ⓘ Meycauayan ⓘ Obando ⓘ Province of Bulacan ⓘ |
| locatedNear | Metro Manila ⓘ |
| monitoredBy |
Philippine government agencies
ⓘ
environmental NGOs ⓘ |
| partOf |
Meycauayan River
self-linksurface differs
ⓘ
surface form:
Meycauayan–Marilao–Obando River System
river systems draining into Manila Bay ⓘ |
| passesThrough |
industrial areas
ⓘ
residential areas ⓘ |
| recognizedAs |
one of the most polluted rivers in the Philippines
ⓘ
one of the most polluted rivers in the world ⓘ |
| subjectOf |
NGO environmental campaigns
ⓘ
government cleanup efforts ⓘ pollution remediation programs ⓘ |
| tributaryOf | Manila Bay ⓘ |
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: Meycauayan River Description of subject: Meycauayan River is a heavily polluted river in Bulacan, Philippines, known for flowing through industrial and residential areas before emptying into Manila Bay.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Meycauayan–Marilao–Obando River System
this entity surface form:
Meycauayan–Marilao–Obando River Basin