Iowa–Illinois state line
E472779
The Iowa–Illinois state line is the boundary separating the U.S. states of Iowa and Illinois, running largely along the Mississippi River and defining part of the border between the Midwest states.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Illinois state boundary | 1 |
| Iowa (via Mississippi River bridges along its corridor) | 1 |
| Iowa–Illinois state line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4828486 — 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: Iowa–Illinois state line Context triple: [Burlington, Iowa–Illinois micropolitan area, crossesStateBoundary, Iowa–Illinois state line]
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A.
Illinois–Indiana state line
The Illinois–Indiana state line is the boundary separating the U.S. states of Illinois and Indiana, running north–south from Lake Michigan through both urban and rural areas.
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B.
Nebraska–Iowa border
The Nebraska–Iowa 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 Iowa to the east.
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C.
Iowa–Minnesota border
The Iowa–Minnesota border is the state line separating Iowa and Minnesota in the Midwestern United States, largely following straight survey lines with some sections defined by rivers.
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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.
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E.
Missouri–Kansas state line
The Missouri–Kansas state line is the boundary separating the states of Missouri and Kansas, notably running through the Kansas City metropolitan area and dividing it between the two 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: Iowa–Illinois state line Target entity description: The Iowa–Illinois state line is the boundary separating the U.S. states of Iowa and Illinois, running largely along the Mississippi River and defining part of the border between the Midwest states.
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A.
Illinois–Indiana state line
The Illinois–Indiana state line is the boundary separating the U.S. states of Illinois and Indiana, running north–south from Lake Michigan through both urban and rural areas.
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B.
Nebraska–Iowa border
The Nebraska–Iowa 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 Iowa to the east.
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C.
Iowa–Minnesota border
The Iowa–Minnesota border is the state line separating Iowa and Minnesota in the Midwestern United States, largely following straight survey lines with some sections defined by rivers.
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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.
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E.
Missouri–Kansas state line
The Missouri–Kansas state line is the boundary separating the states of Missouri and Kansas, notably running through the Kansas City metropolitan area and dividing it between the two states.
- F. None of above. chosen
Statements (48)
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: Iowa–Illinois state line Description of subject: The Iowa–Illinois state line is the boundary separating the U.S. states of Iowa and Illinois, running largely along the Mississippi River and defining part of the border between the Midwest states.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Iowa–Illinois state line
linked to: Iowa–Illinois state line