Union County, South Dakota
E16885
Union County, South Dakota is a county in the southeastern corner of South Dakota known for its agricultural landscape and location along the Missouri River near the Iowa and Nebraska borders.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Union County, South Dakota canonical | 28 |
| Union County, South Dakota, United States | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T84786 — 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: Union County, South Dakota Context triple: [Sioux County, Iowa, borderedBy, Union County, South Dakota]
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A.
Dakota County, Nebraska
Dakota County, Nebraska is a county in northeastern Nebraska along the Missouri River, known for its county seat South Sioux City and its inclusion in the Sioux City metropolitan area.
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B.
Sioux County, Iowa
Sioux County, Iowa is a rural county in northwestern Iowa known for its strong Dutch-American heritage and agricultural economy.
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C.
Cedar County, Iowa
Cedar County, Iowa is a predominantly rural county in eastern Iowa known for its agricultural landscape and historic communities, including the birthplace of President Herbert Hoover in West Branch.
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D.
O'Brien County, Iowa
O'Brien County, Iowa is a rural county in northwestern Iowa known for its agricultural economy and small communities.
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E.
Pottawattamie County, Iowa
Pottawattamie County, Iowa is a county in the southwestern part of the state, known for its county seat and largest city, Council Bluffs, which lies across the Missouri River from Omaha, Nebraska.
- 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: Union County, South Dakota Target entity description: Union County, South Dakota is a county in the southeastern corner of South Dakota known for its agricultural landscape and location along the Missouri River near the Iowa and Nebraska borders.
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A.
Dakota County, Nebraska
Dakota County, Nebraska is a county in northeastern Nebraska along the Missouri River, known for its county seat South Sioux City and its inclusion in the Sioux City metropolitan area.
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B.
Sioux County, Iowa
Sioux County, Iowa is a rural county in northwestern Iowa known for its strong Dutch-American heritage and agricultural economy.
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C.
Cedar County, Iowa
Cedar County, Iowa is a predominantly rural county in eastern Iowa known for its agricultural landscape and historic communities, including the birthplace of President Herbert Hoover in West Branch.
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D.
O'Brien County, Iowa
O'Brien County, Iowa is a rural county in northwestern Iowa known for its agricultural economy and small communities.
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E.
Pottawattamie County, Iowa
Pottawattamie County, Iowa is a county in the southwestern part of the state, known for its county seat and largest city, Council Bluffs, which lies across the Missouri River from Omaha, Nebraska.
- F. None of above. chosen
Statements (46)
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: Union County, South Dakota Description of subject: Union County, South Dakota is a county in the southeastern corner of South Dakota known for its agricultural landscape and location along the Missouri River near the Iowa and Nebraska borders.
Referenced by (29)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Union County Commission (South Dakota)
subject surface form:
Union County Commission (South Dakota)
subject surface form:
Union County Commission (South Dakota)
this entity surface form:
Union County, South Dakota, United States