South Dakota–Wyoming border
E513200
The South Dakota–Wyoming border is the state line in the north-central United States separating South Dakota from Wyoming, running near landmarks such as the Black Hills region.
All labels observed (2)
| Label | Occurrences |
|---|---|
| South Dakota–Wyoming border canonical | 1 |
| Wyoming–South Dakota border | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5280472 — 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: South Dakota–Wyoming border Context triple: [Nebraska–South Dakota border, adjacentTo, South Dakota–Wyoming border]
-
A.
Nebraska–Wyoming border
The Nebraska–Wyoming border is the state line in the western Great Plains where Nebraska meets Wyoming, running largely north–south and helping define the political and geographic boundary between the two states.
-
B.
Nebraska–South Dakota border
The Nebraska–South Dakota border is a U.S. state boundary running largely along the Missouri River, separating Nebraska to the south from South Dakota to the north.
-
C.
Minnesota–South Dakota border
The Minnesota–South Dakota border is the state line in the north-central United States separating Minnesota and South Dakota, much of which follows natural features such as rivers and survey lines across the prairie.
-
D.
Iowa–South Dakota border
The Iowa–South Dakota border is the state line in the north-central United States that largely follows the course of the Big Sioux River, separating Iowa from South Dakota.
-
E.
Nebraska–Missouri border
The Nebraska–Missouri border is the state line in the central United States that largely follows the course of the Missouri River, separating Nebraska to the west from Missouri to the east.
- 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: South Dakota–Wyoming border Target entity description: The South Dakota–Wyoming border is the state line in the north-central United States separating South Dakota from Wyoming, running near landmarks such as the Black Hills region.
-
A.
Nebraska–Wyoming border
The Nebraska–Wyoming border is the state line in the western Great Plains where Nebraska meets Wyoming, running largely north–south and helping define the political and geographic boundary between the two states.
-
B.
Nebraska–South Dakota border
The Nebraska–South Dakota border is a U.S. state boundary running largely along the Missouri River, separating Nebraska to the south from South Dakota to the north.
-
C.
Minnesota–South Dakota border
The Minnesota–South Dakota border is the state line in the north-central United States separating Minnesota and South Dakota, much of which follows natural features such as rivers and survey lines across the prairie.
-
D.
Iowa–South Dakota border
The Iowa–South Dakota border is the state line in the north-central United States that largely follows the course of the Big Sioux River, separating Iowa from South Dakota.
-
E.
Nebraska–Missouri border
The Nebraska–Missouri border is the state line in the central United States that largely follows the course of the Missouri River, separating Nebraska to the west from Missouri to the east.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
international-free internal border
ⓘ
political boundary ⓘ state border ⓘ |
| adjacentTo |
Black Hills region
ⓘ
linked to:
Black Hills
Great Plains region ⓘ
linked to:
Great Plains
|
| borderType | internal U.S. state line ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crossedBy |
Burlington Northern Santa Fe Railway lines
ⓘ
Interstate 90 ⓘ U.S. Route 16 ⓘ U.S. Route 18 ⓘ U.S. Route 85 NERFINISHED ⓘ |
| definedBy | acts of the United States Congress ⓘ |
| establishedBy |
admission of South Dakota to the Union
ⓘ
admission of Wyoming to the Union ⓘ |
| governedBy |
South Dakota state law
ⓘ
United States federal law ⓘ Wyoming state law ⓘ |
| hasAdjacentCityOrTown |
Edgemont, South Dakota
ⓘ
Newcastle, Wyoming ⓘ Spearfish, South Dakota ⓘ
linked to:
Spearfish
Sundance, Wyoming ⓘ |
| hasAdjacentProtectedArea |
Black Hills National Forest
ⓘ
Thunder Basin National Grassland ⓘ
linked to:
Thunder Basin National Grassland (part)
|
| hasBorderingSubdivision |
South Dakota
ⓘ
Wyoming ⓘ |
| hasBorderMarkerType |
boundary posts
ⓘ
survey monuments ⓘ |
| hasCoordinateSystem | defined in degrees of latitude and longitude ⓘ |
| hasLegalStatus |
state boundary recognized by federal law
ⓘ
surveyed boundary line ⓘ |
| hasNoCustomsControl | true ⓘ |
| locatedIn | north-central United States ⓘ |
| near |
Black Hills
ⓘ
Black Hills National Forest ⓘ Custer State Park ⓘ Jewel Cave National Monument ⓘ Thunder Basin National Grassland ⓘ
linked to:
Thunder Basin National Grassland (part)
Wind Cave National Park ⓘ |
| partOf |
borders of South Dakota
ⓘ
borders of Wyoming ⓘ |
| passesThrough |
Crook County, Wyoming
ⓘ
Custer County, South Dakota ⓘ Fall River County, South Dakota ⓘ Weston County, Wyoming ⓘ |
| separates |
South Dakota
ⓘ
Wyoming ⓘ |
| usedFor | jurisdictional delimitation between South Dakota and Wyoming ⓘ |
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: South Dakota–Wyoming border Description of subject: The South Dakota–Wyoming border is the state line in the north-central United States separating South Dakota from Wyoming, running near landmarks such as the Black Hills region.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: South Dakota–Wyoming border