Mattagami River
E419885
The Mattagami River is a major river in northeastern Ontario, Canada, that flows southward through several communities and supports hydroelectric power generation before joining the Moose River system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mattagami River canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1751525 — 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: Mattagami River Context triple: [Timmins, locatedOn, Mattagami River]
-
A.
Kiskiminetas River
The Kiskiminetas River is a tributary of the Allegheny River in western Pennsylvania, known for its role in regional drainage and recreational activities such as fishing and boating.
-
B.
Vuoksi River
The Vuoksi River is a major waterway in northwestern Russia and southeastern Finland, known for connecting Lake Saimaa to Lake Ladoga and playing a key historical and economic role in the region.
-
C.
Lake River
Lake River is a tributary waterway in southwestern Washington State that connects Vancouver Lake to the Columbia River.
-
D.
Michipicoten River
The Michipicoten River is a major river in northeastern Ontario, Canada, that flows into Lake Superior near the town of Wawa and has historically served as an important route for Indigenous peoples and the fur trade.
-
E.
Pemigewasset River
The Pemigewasset River is a major river in central New Hampshire that drains the White Mountains and forms a principal headwater of the Merrimack River.
- 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: Mattagami River Target entity description: The Mattagami River is a major river in northeastern Ontario, Canada, that flows southward through several communities and supports hydroelectric power generation before joining the Moose River system.
-
A.
Kiskiminetas River
The Kiskiminetas River is a tributary of the Allegheny River in western Pennsylvania, known for its role in regional drainage and recreational activities such as fishing and boating.
-
B.
Vuoksi River
The Vuoksi River is a major waterway in northwestern Russia and southeastern Finland, known for connecting Lake Saimaa to Lake Ladoga and playing a key historical and economic role in the region.
-
C.
Lake River
Lake River is a tributary waterway in southwestern Washington State that connects Vancouver Lake to the Columbia River.
-
D.
Michipicoten River
The Michipicoten River is a major river in northeastern Ontario, Canada, that flows into Lake Superior near the town of Wawa and has historically served as an important route for Indigenous peoples and the fur trade.
-
E.
Pemigewasset River
The Pemigewasset River is a major river in central New Hampshire that drains the White Mountains and forms a principal headwater of the Merrimack River.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | Canada ⓘ |
| country | Canada ⓘ |
| drainageBasin | James Bay drainage basin ⓘ |
| emptiesInto |
Moose River
ⓘ
surface form:
James Bay via Moose River
|
| flowsDirection | generally southward ⓘ |
| flowsInto | Moose River NERFINISHED ⓘ |
| flowsThrough |
City of Timmins
ⓘ
Community of Mattagami First Nation ⓘ Community of Smoky Falls ⓘ Smooth Rock Falls ⓘ
surface form:
Community of Smooth Rock Falls
|
| hasBridge | Highway 11 bridge at Smooth Rock Falls ⓘ |
| hasHydroelectricStation |
Harmon Generating Station
ⓘ
Kettle Rapids Generating Station NERFINISHED ⓘ Kipling Generating Station ONDG ⓘ Little Long Generating Station ⓘ Lower Sturgeon Generating Station NERFINISHED ⓘ Sandy Falls Generating Station NERFINISHED ⓘ Smoky Falls Generating Station ⓘ Upper Sturgeon Generating Station NERFINISHED ⓘ Wawaitin Generating Station NERFINISHED ⓘ |
| hasNameEtymology | Derived from an Ojibwe word meaning "meeting of the waters" or similar ⓘ |
| hasTributary |
Grassy River
NERFINISHED
ⓘ
Groundhog River ⓘ Ivanhoe River NERFINISHED ⓘ Kapuskasing River NERFINISHED ⓘ Kenogamissi River NERFINISHED ⓘ Kettle River (Ontario) ⓘ Nat River NERFINISHED ⓘ Tatachikapika River NERFINISHED ⓘ |
| hasWatershedUse |
forestry
ⓘ
mining ⓘ recreation ⓘ |
| locatedIn |
northeastern Ontario
ⓘ
surface form:
Northeastern Ontario
Ontario ⓘ |
| locatedInTimeZone | Eastern Time Zone ⓘ |
| mouthCountry | Canada ⓘ |
| mouthElevation | 0 metres ⓘ |
| mouthLocation | Moose River NERFINISHED ⓘ |
| mouthProvince | Ontario ⓘ |
| partOf |
Moose River
ⓘ
surface form:
Moose River drainage basin
|
| region |
Cochrane District
ⓘ
Sudbury District ⓘ |
| riverSystem | Moose River system ⓘ |
| sourceLocation | Near Timmins, Ontario ⓘ |
| supports |
boating
ⓘ
recreational fishing ⓘ transportation in remote areas ⓘ |
| usedFor | hydroelectric power generation ⓘ |
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: Mattagami River Description of subject: The Mattagami River is a major river in northeastern Ontario, Canada, that flows southward through several communities and supports hydroelectric power generation before joining the Moose River system.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.