Monongahela River
E54914
The Monongahela River is a major waterway in the Appalachian region of the United States that flows north from West Virginia into Pennsylvania, where it joins the Allegheny River at Pittsburgh to form the Ohio River.
All labels observed (7)
How this entity was disambiguated
This entity first appeared as the object of triple T69971 — 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: Monongahela River Context triple: [Pittsburgh region, river, Monongahela River]
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A.
Allegheny River
The Allegheny River is a major waterway in western Pennsylvania and New York that joins the Monongahela River at Pittsburgh to form the Ohio River.
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B.
Susquehanna River
The Susquehanna River is one of the longest rivers on the U.S. East Coast, flowing from New York through Pennsylvania into the Chesapeake Bay and playing a major role in the region’s ecology and history.
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C.
Schuylkill River
The Schuylkill River is a major waterway in eastern Pennsylvania that flows through Philadelphia and has historically been central to the region’s transportation, industry, and recreation.
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D.
Ohio River
The Ohio River is a major waterway in the eastern United States that forms part of several state borders and serves as a key tributary of the Mississippi River.
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E.
Cacapon River
The Cacapon River is a scenic, largely undeveloped river in eastern West Virginia known for its clear waters, outdoor recreation, and role in the Potomac River watershed.
- 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: Monongahela River Target entity description: The Monongahela River is a major waterway in the Appalachian region of the United States that flows north from West Virginia into Pennsylvania, where it joins the Allegheny River at Pittsburgh to form the Ohio River.
-
A.
Allegheny River
The Allegheny River is a major waterway in western Pennsylvania and New York that joins the Monongahela River at Pittsburgh to form the Ohio River.
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B.
Susquehanna River
The Susquehanna River is one of the longest rivers on the U.S. East Coast, flowing from New York through Pennsylvania into the Chesapeake Bay and playing a major role in the region’s ecology and history.
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C.
Schuylkill River
The Schuylkill River is a major waterway in eastern Pennsylvania that flows through Philadelphia and has historically been central to the region’s transportation, industry, and recreation.
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D.
Ohio River
The Ohio River is a major waterway in the eastern United States that forms part of several state borders and serves as a key tributary of the Mississippi River.
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E.
Cacapon River
The Cacapon River is a scenic, largely undeveloped river in eastern West Virginia known for its clear waters, outdoor recreation, and role in the Potomac River watershed.
- F. None of above. chosen
Statements (50)
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: Monongahela River Description of subject: The Monongahela River is a major waterway in the Appalachian region of the United States that flows north from West Virginia into Pennsylvania, where it joins the Allegheny River at Pittsburgh to form the Ohio River.
Referenced by (89)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Munhall, Pennsylvania
this entity surface form:
Monongahela River and Fayette County
this entity surface form:
Monongahela River watershed
subject surface form:
Fairmont, West Virginia
subject surface form:
Fairmont, West Virginia
this entity surface form:
Monongahela River and Tygart Valley River
this entity surface form:
Monongahela River basin
subject surface form:
Smithfield Street Bridge
subject surface form:
Smithfield Street Bridge
subject surface form:
Smithfield Street Bridge