U.S. Route 421
E451396
U.S. Route 421 is a major U.S. highway running generally northeast–southwest across several states in the southeastern United States, connecting cities from North Carolina to Indiana.
All labels observed (2)
| Label | Occurrences |
|---|---|
| U.S. Route 421 canonical | 9 |
| U.S. Route 421 in North Carolina | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T674471 — 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 421 Context triple: [Chatham County, North Carolina, hasMajorHighway, U.S. Route 421]
-
A.
U.S. Route 321
U.S. Route 321 is a major north–south U.S. highway in the southeastern United States that connects Tennessee, North Carolina, and South Carolina, linking cities such as Knoxville, Boone, and Columbia.
-
B.
U.S. Route 441
U.S. Route 441 is a major north–south U.S. Highway running from Florida to Tennessee, serving as an important regional corridor through several southeastern states.
-
C.
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.
-
D.
U.S. Route 250
U.S. Route 250 is a U.S. highway running generally northeast–southwest through several states in the eastern United States, connecting rural areas, small towns, and regional cities.
-
E.
U.S. Route 221
U.S. Route 221 is a north–south United States highway that runs through several southeastern states, connecting rural communities and regional centers.
- 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 421 Target entity description: U.S. Route 421 is a major U.S. highway running generally northeast–southwest across several states in the southeastern United States, connecting cities from North Carolina to Indiana.
-
A.
U.S. Route 321
U.S. Route 321 is a major north–south U.S. highway in the southeastern United States that connects Tennessee, North Carolina, and South Carolina, linking cities such as Knoxville, Boone, and Columbia.
-
B.
U.S. Route 441
U.S. Route 441 is a major north–south U.S. Highway running from Florida to Tennessee, serving as an important regional corridor through several southeastern states.
-
C.
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.
-
D.
U.S. Route 250
U.S. Route 250 is a U.S. highway running generally northeast–southwest through several states in the eastern United States, connecting rural areas, small towns, and regional cities.
-
E.
U.S. Route 221
U.S. Route 221 is a north–south United States highway that runs through several southeastern states, connecting rural communities and regional centers.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
U.S. Highway
ⓘ
numbered highway in the United States ⓘ |
| connectsCity |
Boone, North Carolina
NERFINISHED
ⓘ
Bristol, Tennessee NERFINISHED ⓘ Frankfort, Kentucky NERFINISHED ⓘ Gate City, Virginia NERFINISHED ⓘ Greensboro, North Carolina NERFINISHED ⓘ Greensburg, Indiana NERFINISHED ⓘ Harlan, Kentucky NERFINISHED ⓘ Indianapolis, Indiana NERFINISHED ⓘ Lexington, Kentucky NERFINISHED ⓘ Madison, Indiana NERFINISHED ⓘ Michigan City, Indiana NERFINISHED ⓘ Versailles, Kentucky NERFINISHED ⓘ Wilmington, North Carolina NERFINISHED ⓘ Winston-Salem, North Carolina NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crossesFeature |
Cape Fear River in North Carolina
ⓘ
Ohio River at Madison, Indiana NERFINISHED ⓘ |
| direction | northeast–southwest ⓘ |
| hasJunctionWith |
Interstate 40
NERFINISHED
ⓘ
Interstate 465 NERFINISHED ⓘ Interstate 64 NERFINISHED ⓘ Interstate 65 NERFINISHED ⓘ Interstate 74 NERFINISHED ⓘ Interstate 77 NERFINISHED ⓘ Interstate 85 NERFINISHED ⓘ U.S. Route 17 NERFINISHED ⓘ U.S. Route 25 NERFINISHED ⓘ U.S. Route 31 NERFINISHED ⓘ U.S. Route 52 NERFINISHED ⓘ |
| highwayNumber | 421 NERFINISHED ⓘ |
| maintainedBy |
state departments of transportation of Indiana
ⓘ
state departments of transportation of Kentucky ⓘ state departments of transportation of North Carolina ⓘ state departments of transportation of Tennessee ⓘ state departments of transportation of Virginia ⓘ |
| partOf | United States Numbered Highway System ⓘ |
| passesThrough |
Indiana
NERFINISHED
ⓘ
Kentucky NERFINISHED ⓘ North Carolina NERFINISHED ⓘ Tennessee NERFINISHED ⓘ Virginia NERFINISHED ⓘ |
| region |
Midwestern United States
ⓘ
Southern United States ⓘ
surface form:
Southeastern United States
|
| routeType | primary U.S. Highway ⓘ |
| servesAs | regional connector between North Carolina and Indiana ⓘ |
| stateAbbreviation | US 421 NERFINISHED ⓘ |
| terminusNorth | Michigan City, Indiana NERFINISHED ⓘ |
| terminusSouth |
Fort Fisher, North Carolina
NERFINISHED
ⓘ
near Kure Beach, North 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 421 Description of subject: U.S. Route 421 is a major U.S. highway running generally northeast–southwest across several states in the southeastern United States, connecting cities from North Carolina to Indiana.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
U.S. Route 421 in North Carolina