O'Brien County, Iowa
E15346
O'Brien County, Iowa is a rural county in northwestern Iowa known for its agricultural economy and small communities.
All labels observed (3)
| Label | Occurrences |
|---|---|
| O'Brien County, Iowa canonical | 30 |
| O'Brien County, Iowa (in part or whole) | 1 |
| OBrien County, Iowa | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T84783 — 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: O'Brien County, Iowa Context triple: [Sioux County, Iowa, borderedBy, O'Brien County, Iowa]
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A.
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.
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B.
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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C.
Marion County, Iowa
Marion County, Iowa is a county in south-central Iowa known for its Dutch heritage in the city of Pella and its mix of agricultural and small-town communities.
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D.
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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E.
Howard County, Iowa
Howard County, Iowa is a rural county in northeastern Iowa known for its agricultural landscape and as the home of the city of Cresco.
- 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: O'Brien County, Iowa Target entity description: O'Brien County, Iowa is a rural county in northwestern Iowa known for its agricultural economy and small communities.
-
A.
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.
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B.
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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C.
Marion County, Iowa
Marion County, Iowa is a county in south-central Iowa known for its Dutch heritage in the city of Pella and its mix of agricultural and small-town communities.
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D.
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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E.
Howard County, Iowa
Howard County, Iowa is a rural county in northeastern Iowa known for its agricultural landscape and as the home of the city of Cresco.
- F. None of above. chosen
Statements (49)
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: O'Brien County, Iowa Description of subject: O'Brien County, Iowa is a rural county in northwestern Iowa known for its agricultural economy and small communities.
Referenced by (32)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
OBrien County, Iowa
subject surface form:
Iowa House District 3
this entity surface form:
O'Brien County, Iowa (in part or whole)
subject surface form:
Mill Creek (O'Brien County, Iowa)
subject surface form:
Mill Creek (O'Brien County, Iowa)