Pennsylvania Route 21
E111309
Pennsylvania Route 21 is a state highway in southwestern Pennsylvania that runs east–west, connecting communities such as Uniontown to the West Virginia state line and serving as a key regional corridor.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Pennsylvania Route 21 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T281474 — 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: Pennsylvania Route 21 Context triple: [Uniontown, Pennsylvania, hasMajorHighway, Pennsylvania Route 21]
-
A.
Pennsylvania Route 51
Pennsylvania Route 51 is a major north–south state highway in western Pennsylvania that connects the Pittsburgh area with communities to the south, including Uniontown.
-
B.
Pennsylvania Route 819
Pennsylvania Route 819 is a north–south state highway in western Pennsylvania that connects several small communities and provides local access between rural areas and larger regional routes.
-
C.
U.S. Route 206
U.S. Route 206 is a north–south United States highway running through central New Jersey and eastern Pennsylvania, connecting communities from the Delaware Valley to the New York metropolitan area.
-
D.
U.S. Route 201
U.S. Route 201 is a north–south United States highway in Maine that runs from Brunswick through Augusta to the Canadian border, serving as a key regional transportation corridor.
-
E.
U.S. Route 202
U.S. Route 202 is a major U.S. highway running through the northeastern United States, connecting several states and key cities from Delaware to Maine.
- 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: Pennsylvania Route 21 Target entity description: Pennsylvania Route 21 is a state highway in southwestern Pennsylvania that runs east–west, connecting communities such as Uniontown to the West Virginia state line and serving as a key regional corridor.
-
A.
Pennsylvania Route 51
Pennsylvania Route 51 is a major north–south state highway in western Pennsylvania that connects the Pittsburgh area with communities to the south, including Uniontown.
-
B.
Pennsylvania Route 819
Pennsylvania Route 819 is a north–south state highway in western Pennsylvania that connects several small communities and provides local access between rural areas and larger regional routes.
-
C.
U.S. Route 206
U.S. Route 206 is a north–south United States highway running through central New Jersey and eastern Pennsylvania, connecting communities from the Delaware Valley to the New York metropolitan area.
-
D.
U.S. Route 201
U.S. Route 201 is a north–south United States highway in Maine that runs from Brunswick through Augusta to the Canadian border, serving as a key regional transportation corridor.
-
E.
U.S. Route 202
U.S. Route 202 is a major U.S. highway running through the northeastern United States, connecting several states and key cities from Delaware to Maine.
- F. None of above. chosen
Statements (27)
| Predicate | Object |
|---|---|
| instanceOf |
road transportation infrastructure
ⓘ
state highway ⓘ |
| connectsTo |
Uniontown metropolitan area
ⓘ
surface form:
Uniontown urban area
West Virginia state highway network ⓘ |
| country | United States of America ⓘ |
| direction | east–west ⓘ |
| easternTerminus |
Uniontown, Pennsylvania, United States
ⓘ
surface form:
Uniontown, Pennsylvania
|
| function |
connector between Pennsylvania and West Virginia
ⓘ
regional corridor ⓘ |
| hasLanes |
multi-lane segments
ⓘ
two-lane segments ⓘ |
| highwayNumber | 21 ⓘ |
| highwayType |
Pennsylvania state highway system
ⓘ
surface form:
Pennsylvania state route
|
| locatedIn |
Pennsylvania
ⓘ
surface form:
Commonwealth of Pennsylvania
Southwestern Pennsylvania ⓘ
surface form:
southwestern Pennsylvania
|
| maintainedBy | Pennsylvania Department of Transportation ⓘ |
| partOfNetwork | Pennsylvania state highway system ⓘ |
| passesThroughRegion |
Fayette County, Pennsylvania
ⓘ
Greene County, Pennsylvania ⓘ |
| roadClassification | state highway ⓘ |
| servesCommunity |
Uniontown, Pennsylvania, United States
ⓘ
surface form:
Uniontown, Pennsylvania
communities near the West Virginia state line ⓘ |
| usedFor |
commuter travel
ⓘ
goods movement ⓘ local traffic ⓘ regional traffic ⓘ |
| westernTerminus | West Virginia state line ⓘ |
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: Pennsylvania Route 21 Description of subject: Pennsylvania Route 21 is a state highway in southwestern Pennsylvania that runs east–west, connecting communities such as Uniontown to the West Virginia state line and serving as a key regional corridor.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Uniontown, Pennsylvania