Powder River Basin
E866803
Powder River Basin is a major geologic and energy-producing region in northeastern Wyoming and southeastern Montana, best known for its vast coal, oil, and natural gas reserves.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Powder River Basin canonical | 2 |
| Powder River Basin area | 1 |
| Powder River Basin region | 1 |
| Powder River structural basin | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10472807 — 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: Powder River Basin Context triple: [Powder River Country, contains, Powder River Basin]
-
A.
Williston Basin
The Williston Basin is a large sedimentary basin in the northern Great Plains of the United States and Canada, known for its rich oil and gas reserves, including the prolific Bakken Formation.
-
B.
McClure Basin
McClure Basin is a reservoir created by McClure Dam, primarily used for water storage and related recreational and environmental purposes.
-
C.
Powder River Country
Powder River Country is a region in northeastern Wyoming known historically as a key area of conflict between the United States and Plains Indian tribes during the mid-19th century.
-
D.
Bighorn Basin
The Bighorn Basin is a broad intermontane basin in north-central Wyoming and south-central Montana, known for its rich fossil beds, energy resources, and surrounding mountain ranges.
-
E.
Permian Basin
The Permian Basin is a vast sedimentary basin in western Texas and southeastern New Mexico that is one of the most productive oil and natural gas regions 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: Powder River Basin Target entity description: Powder River Basin is a major geologic and energy-producing region in northeastern Wyoming and southeastern Montana, best known for its vast coal, oil, and natural gas reserves.
-
A.
Williston Basin
The Williston Basin is a large sedimentary basin in the northern Great Plains of the United States and Canada, known for its rich oil and gas reserves, including the prolific Bakken Formation.
-
B.
McClure Basin
McClure Basin is a reservoir created by McClure Dam, primarily used for water storage and related recreational and environmental purposes.
-
C.
Powder River Country
Powder River Country is a region in northeastern Wyoming known historically as a key area of conflict between the United States and Plains Indian tribes during the mid-19th century.
-
D.
Bighorn Basin
The Bighorn Basin is a broad intermontane basin in north-central Wyoming and south-central Montana, known for its rich fossil beds, energy resources, and surrounding mountain ranges.
-
E.
Permian Basin
The Permian Basin is a vast sedimentary basin in western Texas and southeastern New Mexico that is one of the most productive oil and natural gas regions in the United States.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
energy-producing region
ⓘ
geologic basin ⓘ |
| administrativeJurisdiction |
State of Montana
NERFINISHED
ⓘ
State of Wyoming NERFINISHED ⓘ |
| borders |
Big Horn Mountains
NERFINISHED
ⓘ
Black Hills NERFINISHED ⓘ |
| coalQuality | low sulfur content ⓘ |
| coalRank | sub-bituminous ⓘ |
| coalSeam | Wyodak coal seam NERFINISHED ⓘ |
| containsCity |
Buffalo, Wyoming
NERFINISHED
ⓘ
Gillette, Wyoming NERFINISHED ⓘ Miles City, Montana NERFINISHED ⓘ Sheridan, Wyoming NERFINISHED ⓘ |
| containsCounty |
Big Horn County, Wyoming
NERFINISHED
ⓘ
Campbell County, Wyoming NERFINISHED ⓘ Converse County, Wyoming NERFINISHED ⓘ Custer County, Montana NERFINISHED ⓘ Powder River County, Montana NERFINISHED ⓘ Rosebud County, Montana NERFINISHED ⓘ Sheridan County, Wyoming NERFINISHED ⓘ |
| containsFormation |
Fort Union Formation
NERFINISHED
ⓘ
Wasatch Formation NERFINISHED ⓘ |
| containsResource |
coal
ⓘ
coalbed methane ⓘ crude oil ⓘ natural gas ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| economicImportance | major source of low-sulfur coal in the United States ⓘ |
| energyInfrastructure | unit train coal rail lines ⓘ |
| geologicAge |
Cretaceous
NERFINISHED
ⓘ
Paleocene NERFINISHED ⓘ |
| geologicProvince | Northern Rocky Mountain coal province NERFINISHED ⓘ |
| hydrologicFeature |
Little Powder River
NERFINISHED
ⓘ
Powder River NERFINISHED ⓘ Tongue River NERFINISHED ⓘ |
| knownFor |
coal production
ⓘ
natural gas production ⓘ oil production ⓘ |
| locatedIn |
Montana
ⓘ
Wyoming ⓘ |
| locatedInRegion |
northeastern Wyoming
ⓘ
southeastern Montana ⓘ |
| majorCoalMiningMethod | surface mining ⓘ |
| majorIndustry |
coal mining
ⓘ
oil and gas extraction ⓘ |
| namedAfter | Powder River NERFINISHED ⓘ |
| partOf |
Northern Great Plains
NERFINISHED
ⓘ
Rocky Mountain region NERFINISHED ⓘ |
| resourceType | sub-bituminous coal ⓘ |
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: Powder River Basin Description of subject: Powder River Basin is a major geologic and energy-producing region in northeastern Wyoming and southeastern Montana, best known for its vast coal, oil, and natural gas reserves.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Powder River Basin region
this entity surface form:
Powder River structural basin
this entity surface form:
Powder River Basin area