Iowa Highway 21
E562697
Iowa Highway 21 is a state highway in Iowa that runs north–south through the central part of the state, connecting several small towns and rural areas to larger regional routes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Iowa Highway 21 canonical | 8 |
How this entity was disambiguated
This entity first appeared as the object of triple T5502738 — 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 Highway 21 Context triple: [Iowa state highways, hasComponent, Iowa Highway 21]
-
A.
Iowa Highway 22
Iowa Highway 22 is a state highway in eastern Iowa that runs east–west, connecting several small communities and serving as a regional route between U.S. Highway 218 and the Mississippi River near Muscatine.
-
B.
Iowa Highway 27
Iowa Highway 27 is a north–south state highway in Iowa that largely follows the Avenue of the Saints corridor, connecting several major cities across the state.
-
C.
Iowa Highway 2
Iowa Highway 2 is an east–west state highway spanning southern Iowa, running near the Missouri border and connecting several small towns and regional routes across the state.
-
D.
Iowa Highway 17
Iowa Highway 17 is a north–south state highway in Iowa that connects several small communities and rural areas in the central part of the state.
-
E.
Iowa Highway 25
Iowa Highway 25 is a north–south state highway in western Iowa that runs through several counties, including Adair County, connecting rural communities and major routes.
- 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 Highway 21 Target entity description: Iowa Highway 21 is a state highway in Iowa that runs north–south through the central part of the state, connecting several small towns and rural areas to larger regional routes.
-
A.
Iowa Highway 22
Iowa Highway 22 is a state highway in eastern Iowa that runs east–west, connecting several small communities and serving as a regional route between U.S. Highway 218 and the Mississippi River near Muscatine.
-
B.
Iowa Highway 27
Iowa Highway 27 is a north–south state highway in Iowa that largely follows the Avenue of the Saints corridor, connecting several major cities across the state.
-
C.
Iowa Highway 2
Iowa Highway 2 is an east–west state highway spanning southern Iowa, running near the Missouri border and connecting several small towns and regional routes across the state.
-
D.
Iowa Highway 17
Iowa Highway 17 is a north–south state highway in Iowa that connects several small communities and rural areas in the central part of the state.
-
E.
Iowa Highway 25
Iowa Highway 25 is a north–south state highway in western Iowa that runs through several counties, including Adair County, connecting rural communities and major routes.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf | state highway ⓘ |
| connectsAreaType |
rural areas
ⓘ
small towns ⓘ |
| connectsTo | larger regional routes ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| hasAccessControl | at-grade intersections ⓘ |
| hasDirectionA | south ⓘ |
| hasDirectionB | north ⓘ |
| highwayNumber | 21 ⓘ |
| highwayType | Iowa state highway ⓘ |
| isNumberedWithin | Iowa primary highway network ⓘ |
| jurisdiction | state ⓘ |
| locatedIn | Iowa ⓘ |
| maintainedBy | Iowa Department of Transportation ⓘ |
| partOf |
Iowa State Highway system
ⓘ
linked to:
Iowa state highways
|
| roadFunction |
connector route
ⓘ
feeder to regional highways ⓘ |
| roadSurface | paved ⓘ |
| routeOrientation | north–south ⓘ |
| runsThroughRegion | central Iowa ⓘ |
| serves | rural communities in Iowa ⓘ |
| usedFor |
automobile traffic
ⓘ
local travel ⓘ regional travel ⓘ truck traffic ⓘ |
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 Highway 21 Description of subject: Iowa Highway 21 is a state highway in Iowa that runs north–south through the central part of the state, connecting several small towns and rural areas to larger regional routes.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.