Calpine Corporation
E388097
Calpine Corporation is a major American power company specializing in natural gas-fired and geothermal electricity generation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Calpine Corporation canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3778912 — 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: Calpine Corporation Context triple: [The Geysers geothermal field, hasOperator, Calpine Corporation]
-
A.
Vistra Corp
Vistra Corp is a large U.S. integrated retail electricity and power generation company.
-
B.
NRG Energy
NRG Energy is a large American energy company that produces and sells electricity and related services to residential, commercial, and industrial customers.
-
C.
Reliant Energy
Reliant Energy is a U.S.-based retail electricity provider and energy company known for supplying power to residential and commercial customers, particularly in Texas.
-
D.
PacifiCorp
PacifiCorp is a major U.S. electric utility company serving customers across several Western states.
-
E.
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.
- 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: Calpine Corporation Target entity description: Calpine Corporation is a major American power company specializing in natural gas-fired and geothermal electricity generation.
-
A.
Vistra Corp
Vistra Corp is a large U.S. integrated retail electricity and power generation company.
-
B.
NRG Energy
NRG Energy is a large American energy company that produces and sells electricity and related services to residential, commercial, and industrial customers.
-
C.
Reliant Energy
Reliant Energy is a U.S.-based retail electricity provider and energy company known for supplying power to residential and commercial customers, particularly in Texas.
-
D.
PacifiCorp
PacifiCorp is a major U.S. electric utility company serving customers across several Western states.
-
E.
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.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
corporation
ⓘ
electric power company ⓘ public company ⓘ |
| acquiredBy | Energy Capital Partners ⓘ |
| acquisitionYear | 2018 ⓘ |
| businessModel | independent power producer ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| delistedFrom | New York Stock Exchange ⓘ |
| employs | thousands of employees ⓘ |
| energySource |
geothermal energy
ⓘ
natural gas ⓘ |
| environmentalStrategy | reduction of greenhouse gas emissions intensity ⓘ |
| focusesOn |
competitive wholesale power markets
ⓘ
low-carbon power generation ⓘ |
| formerHeadquartersLocation |
San Jose, California
ⓘ
linked to:
San Jose
|
| foundedBy | Peter Cartwright ⓘ |
| fuelType | geothermal steam ⓘ |
| generates | electricity ⓘ |
| hasCustomerType |
large industrial customers
ⓘ
retail energy providers ⓘ utilities ⓘ |
| hasSubsidiary | Calpine Energy Services, L.P. ⓘ |
| hasWebsite | https://www.calpine.com ⓘ |
| headquartersLocation |
Houston, Texas
ⓘ
linked to:
Houston, Texas, United States
|
| inception | 1984 ⓘ |
| industry |
electric power generation
ⓘ
energy ⓘ |
| knownFor |
large fleet of natural gas-fired power plants
ⓘ
largest geothermal power portfolio in North America ⓘ |
| legalForm | Delaware corporation ⓘ |
| locatedInTimeZone | Central Time Zone ⓘ |
| marketRole | independent power producer in North America ⓘ |
| notableAsset |
The Geysers geothermal complex
ⓘ
linked to:
The Geysers geothermal field
|
| operates |
The Geysers geothermal complex
ⓘ
linked to:
The Geysers geothermal field
|
| owns |
The Geysers geothermal complex
ⓘ
linked to:
The Geysers geothermal field
|
| participatesIn | wholesale electricity markets in the United States ⓘ |
| powerPlantType |
combined-cycle natural gas power plant
ⓘ
geothermal power plant ⓘ simple-cycle natural gas power plant ⓘ |
| regionServed |
United States
ⓘ
linked to:
United States of America
|
| specializesIn |
geothermal power generation
ⓘ
natural gas-fired power generation ⓘ |
| tradedAs | NYSE:CPN ⓘ |
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: Calpine Corporation Description of subject: Calpine Corporation is a major American power company specializing in natural gas-fired and geothermal electricity generation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.