Ontario Power Generation
E255688
Ontario Power Generation is a large, government-owned electricity producer in Ontario, Canada, primarily known for operating nuclear, hydroelectric, and other power generating stations across the province.
All labels observed (5)
How this entity was disambiguated
This entity first appeared as the object of triple T2319666 — 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: Ontario Power Generation Context triple: [Nipigon River, hydroelectricOperator, Ontario Power Generation]
-
A.
Newfoundland and Labrador Hydro
Newfoundland and Labrador Hydro is a provincial Crown-owned electric utility in Newfoundland and Labrador responsible for generating and transmitting electricity across the province.
-
B.
Hydro-Québec
Hydro-Québec is a Canadian public utility company owned by the government of Quebec that generates, transmits, and distributes electricity, primarily from hydroelectric power.
-
C.
Atomic Energy of Canada Limited
Atomic Energy of Canada Limited is a Canadian federal Crown corporation responsible for nuclear energy research, development, and technology, including the design of CANDU reactors.
-
D.
Exelon
Exelon is a major American energy company and utility services holding corporation, known for operating one of the largest fleets of nuclear power plants in the United States.
-
E.
Muskrat Falls Generating Station
Muskrat Falls Generating Station is a large hydroelectric power facility on the lower Churchill River in Labrador, Canada, developed to supply renewable electricity to Newfoundland and Labrador and beyond.
- 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: Ontario Power Generation Target entity description: Ontario Power Generation is a large, government-owned electricity producer in Ontario, Canada, primarily known for operating nuclear, hydroelectric, and other power generating stations across the province.
-
A.
Newfoundland and Labrador Hydro
Newfoundland and Labrador Hydro is a provincial Crown-owned electric utility in Newfoundland and Labrador responsible for generating and transmitting electricity across the province.
-
B.
Hydro-Québec
Hydro-Québec is a Canadian public utility company owned by the government of Quebec that generates, transmits, and distributes electricity, primarily from hydroelectric power.
-
C.
Atomic Energy of Canada Limited
Atomic Energy of Canada Limited is a Canadian federal Crown corporation responsible for nuclear energy research, development, and technology, including the design of CANDU reactors.
-
D.
Exelon
Exelon is a major American energy company and utility services holding corporation, known for operating one of the largest fleets of nuclear power plants in the United States.
-
E.
Muskrat Falls Generating Station
Muskrat Falls Generating Station is a large hydroelectric power facility on the lower Churchill River in Labrador, Canada, developed to supply renewable electricity to Newfoundland and Labrador and beyond.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Crown corporation
ⓘ
electric power producer ⓘ electric utility company ⓘ |
| country | Canada ⓘ |
| employerType | public sector employer ⓘ |
| formerName |
Ontario Power Generation
self-linksurface differs
ⓘ
surface form:
Ontario Hydro (generation business unit)
|
| generatesFromEnergySource |
biomass
ⓘ
hydroelectric power ⓘ natural gas ⓘ nuclear power ⓘ solar power ⓘ wind power ⓘ |
| hasAbbreviation | OPG ⓘ |
| hasDivision |
Ontario nuclear generating fleet
ⓘ
surface form:
OPG Nuclear
OPG Renewable Generation ⓘ OPG Thermal ⓘ |
| hasEnvironmentalProgram |
biodiversity and habitat conservation programs
ⓘ
greenhouse gas reduction initiatives ⓘ |
| hasKeyActivity |
decommissioning of retired generating stations
ⓘ
electricity wholesale to Ontario market ⓘ operation of hydroelectric power stations ⓘ operation of nuclear power plants ⓘ radioactive waste management ⓘ |
| headquartersLocation |
Toronto
ⓘ
surface form:
Toronto, Ontario, Canada
|
| inception | 1999 ⓘ |
| industry | electric power generation ⓘ |
| languageOfWork |
English
ⓘ
French ⓘ |
| legalForm | Crown corporation of Ontario ⓘ |
| locatedInTimeZone | Eastern Time Zone ⓘ |
| operatesFacility |
Darlington Nuclear Generating Station
ⓘ
DeCew Falls Generating Stations ⓘ Pickering Nuclear Generating Station ⓘ R. H. Saunders Generating Station ⓘ
surface form:
R.H. Saunders Generating Station
Sir Adam Beck Hydroelectric Generating Stations ⓘ various thermal generating stations in Ontario ⓘ |
| operatesInJurisdiction |
Ontario
ⓘ
surface form:
Province of Ontario
|
| owner | Government of Ontario ⓘ |
| parentOrganization |
Ontario
ⓘ
surface form:
Province of Ontario
|
| precededBy | Ontario Hydro ⓘ |
| primaryProduct | electricity ⓘ |
| publiclyOwnedBy | people of Ontario through the Government of Ontario ⓘ |
| regulator |
Canadian Nuclear Safety Commission
ⓘ
Ontario Energy Board ⓘ |
| sector | energy sector ⓘ |
| serviceArea |
Ontario electricity grid
ⓘ
surface form:
Ontario electricity market
|
| stockExchangeListed | not publicly traded ⓘ |
| subsidiary |
Ontario Power Generation
self-linksurface differs
ⓘ
surface form:
Ontario Power Generation Inc. (operating company structure)
|
| website | https://www.opg.com ⓘ |
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: Ontario Power Generation Description of subject: Ontario Power Generation is a large, government-owned electricity producer in Ontario, Canada, primarily known for operating nuclear, hydroelectric, and other power generating stations across the province.
Referenced by (23)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Ontario Hydro
this entity surface form:
Ontario Hydro (generation business unit)
this entity surface form:
Ontario Power Generation Inc. (operating company structure)
this entity surface form:
Ontario Power Generation hydroelectric fleet