U.S. Route 21
E691247
U.S. Route 21 is a north–south United States highway that historically connected the Atlantic coast of South Carolina to the Appalachian region and beyond, serving as a key corridor through the Carolinas.
All labels observed (1)
| Label | Occurrences |
|---|---|
| U.S. Route 21 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T1220977 — 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: U.S. Route 21 Context triple: [Statesville, North Carolina, transportHubFor, U.S. Route 21]
-
A.
U.S. Route 29
U.S. Route 29 is a major north–south U.S. Highway running from Florida to Virginia, connecting numerous cities across the southeastern and mid-Atlantic United States.
-
B.
U.S. Route 23
U.S. Route 23 is a major north–south U.S. highway running from Florida to Michigan, serving as a key regional transportation artery through several eastern and midwestern states.
-
C.
U.S. Route 14
U.S. Route 14 is a major east–west U.S. Highway that runs from Chicago, Illinois, across the northern Midwest and Great Plains to Yellowstone National Park in Wyoming.
-
D.
U.S. Route 25
U.S. Route 25 is a major north–south United States highway that runs from Brunswick, Georgia, to the Ohio–Michigan state line, connecting numerous cities across the southeastern and midwestern U.S.
-
E.
U.S. Route 11
U.S. Route 11 is a major north–south U.S. Highway running through the eastern United States, connecting numerous cities and regions from Louisiana to New York.
- 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: U.S. Route 21 Target entity description: U.S. Route 21 is a north–south United States highway that historically connected the Atlantic coast of South Carolina to the Appalachian region and beyond, serving as a key corridor through the Carolinas.
-
A.
U.S. Route 29
U.S. Route 29 is a major north–south U.S. Highway running from Florida to Virginia, connecting numerous cities across the southeastern and mid-Atlantic United States.
-
B.
U.S. Route 23
U.S. Route 23 is a major north–south U.S. highway running from Florida to Michigan, serving as a key regional transportation artery through several eastern and midwestern states.
-
C.
U.S. Route 14
U.S. Route 14 is a major east–west U.S. Highway that runs from Chicago, Illinois, across the northern Midwest and Great Plains to Yellowstone National Park in Wyoming.
-
D.
U.S. Route 25
U.S. Route 25 is a major north–south United States highway that runs from Brunswick, Georgia, to the Ohio–Michigan state line, connecting numerous cities across the southeastern and midwestern U.S.
-
E.
U.S. Route 11
U.S. Route 11 is a major north–south U.S. Highway running through the eastern United States, connecting numerous cities and regions from Louisiana to New York.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | U.S. Highway ⓘ |
| category |
U.S. Highways in North Carolina
ⓘ
U.S. Highways in South Carolina ⓘ U.S. Highways in Virginia ⓘ |
| connectedTo |
Appalachian region
NERFINISHED
ⓘ
Atlantic coast of South Carolina NERFINISHED ⓘ |
| connectsCity |
Charlotte, North Carolina
NERFINISHED
ⓘ
Columbia, South Carolina NERFINISHED ⓘ Rock Hill, South Carolina NERFINISHED ⓘ |
| connectsRegion |
Appalachian Mountains
NERFINISHED
ⓘ
Atlantic coastal plain NERFINISHED ⓘ Piedmont region NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| direction | north–south ⓘ |
| established | 1926 ⓘ |
| formerExtent |
Cleveland, Ohio
NERFINISHED
ⓘ
Jacksonville, Florida NERFINISHED ⓘ |
| historicalRole |
connection between the Atlantic coast of South Carolina and the Appalachian region
ⓘ
key corridor through the Carolinas ⓘ |
| locatedIn |
Eastern United States
NERFINISHED
ⓘ
North Carolina ⓘ South Carolina ⓘ Virginia ⓘ |
| maintainedBy |
North Carolina Department of Transportation
NERFINISHED
ⓘ
South Carolina Department of Transportation NERFINISHED ⓘ Virginia Department of Transportation ⓘ |
| overlapsWith | Interstate 77 NERFINISHED ⓘ |
| paralleledBy | Interstate 77 NERFINISHED ⓘ |
| partOf | United States Numbered Highway System ⓘ |
| passesThrough |
Alleghany County, North Carolina
NERFINISHED
ⓘ
Beaufort County, South Carolina NERFINISHED ⓘ Charlotte, North Carolina NERFINISHED ⓘ Chester County, South Carolina NERFINISHED ⓘ Columbia, South Carolina NERFINISHED ⓘ Fairfield County, South Carolina NERFINISHED ⓘ Iredell County, North Carolina NERFINISHED ⓘ Mecklenburg County, North Carolina NERFINISHED ⓘ Rock Hill, South Carolina NERFINISHED ⓘ Sparta, North Carolina NERFINISHED ⓘ Wythe County, Virginia NERFINISHED ⓘ York County, South Carolina NERFINISHED ⓘ |
| status | partially decommissioned ⓘ |
| terminusNorth |
Wytheville, Virginia
NERFINISHED
ⓘ
junction with Interstate 81 ⓘ |
| terminusSouth |
Hunting Island State Park, South Carolina
NERFINISHED
ⓘ
near Beaufort, South Carolina ⓘ |
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: U.S. Route 21 Description of subject: U.S. Route 21 is a north–south United States highway that historically connected the Atlantic coast of South Carolina to the Appalachian region and beyond, serving as a key corridor through the Carolinas.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.