Canada–United States border
E131553
The Canada–United States border is the world’s longest international land boundary, separating Canada and the United States across diverse terrains from the Atlantic to the Pacific and Arctic Oceans.
All labels observed (30)
How this entity was disambiguated
This entity first appeared as the object of triple T1148420 — 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: Canada–United States border Context triple: [Windsor International Airport, locatedNear, Canada–United States border]
-
A.
Canada–United States border region
The Canada–United States border region is the extensive transboundary area where the two countries meet, encompassing shared ecosystems, waterways, and communities that require coordinated environmental and policy management.
-
B.
U.S.–Mexico border
The U.S.–Mexico border is the international boundary separating the United States and Mexico, stretching from the Pacific Ocean to the Gulf of Mexico and serving as a major focal point for migration, trade, and security issues.
-
C.
Van Buren–Saint-Léonard Border Crossing
The Van Buren–Saint-Léonard Border Crossing is an international crossing over the Saint John River connecting Van Buren, Maine, in the United States with Saint-Léonard, New Brunswick, in Canada.
-
D.
Quebec–Newfoundland and Labrador border
The Quebec–Newfoundland and Labrador border is the interprovincial boundary in eastern Canada separating Quebec from the mainland portion of Newfoundland and Labrador across the Labrador Peninsula.
-
E.
Madawaska–Edmundston Border Crossing
The Madawaska–Edmundston Border Crossing is an international crossing over the Saint John River connecting Madawaska, Maine, in the United States with Edmundston, New Brunswick, in Canada.
- 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: Canada–United States border Target entity description: The Canada–United States border is the world’s longest international land boundary, separating Canada and the United States across diverse terrains from the Atlantic to the Pacific and Arctic Oceans.
-
A.
Canada–United States border region
The Canada–United States border region is the extensive transboundary area where the two countries meet, encompassing shared ecosystems, waterways, and communities that require coordinated environmental and policy management.
-
B.
U.S.–Mexico border
The U.S.–Mexico border is the international boundary separating the United States and Mexico, stretching from the Pacific Ocean to the Gulf of Mexico and serving as a major focal point for migration, trade, and security issues.
-
C.
Van Buren–Saint-Léonard Border Crossing
The Van Buren–Saint-Léonard Border Crossing is an international crossing over the Saint John River connecting Van Buren, Maine, in the United States with Saint-Léonard, New Brunswick, in Canada.
-
D.
Quebec–Newfoundland and Labrador border
The Quebec–Newfoundland and Labrador border is the interprovincial boundary in eastern Canada separating Quebec from the mainland portion of Newfoundland and Labrador across the Labrador Peninsula.
-
E.
Madawaska–Edmundston Border Crossing
The Madawaska–Edmundston Border Crossing is an international crossing over the Saint John River connecting Madawaska, Maine, in the United States with Edmundston, New Brunswick, in Canada.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
international border
ⓘ
land border ⓘ political boundary ⓘ |
| country1 | Canada ⓘ |
| country2 |
United States of America
ⓘ
surface form:
United States
|
| demarcatedBy |
boundary markers
ⓘ
survey monuments ⓘ |
| establishedBy | various historical treaties ⓘ |
| extendsFrom | Atlantic Ocean ⓘ |
| extendsTo |
Arctic Ocean
ⓘ
Pacific Ocean ⓘ |
| governedBy |
Boundary Waters Treaty of 1909
ⓘ
surface form:
Canada–United States treaties
|
| hasApproximateLength |
5525 miles
ⓘ
8891 km ⓘ |
| hasBorderCrossings |
bridge crossings
ⓘ
ferry crossings ⓘ land ports of entry ⓘ rail crossings ⓘ |
| hasDisputedSections | some maritime areas ⓘ |
| hasNotableFeature |
49th parallel north section
ⓘ
Great Lakes region ⓘ
surface form:
Great Lakes section
Saint Lawrence River ⓘ
surface form:
St. Lawrence River section
|
| historicalTreaty |
Jay Treaty
ⓘ
Oregon Treaty of 1846 ⓘ
surface form:
Oregon Treaty
Convention of 1818 ⓘ
surface form:
Treaty of 1818
Treaty of Paris (1783) ⓘ
surface form:
Treaty of Paris 1783
Webster–Ashburton Treaty ⓘ |
| includesMaritimeBoundary | yes ⓘ |
| includesSection |
Canada–United States border
self-linksurface differs
ⓘ
surface form:
Alaska–Canada border
border between contiguous United States and Canada ⓘ |
| isDemilitarized | largely ⓘ |
| isHeavilyTrafficked | true ⓘ |
| isLongestInternationalLandBoundary | true ⓘ |
| monitoredBy |
Canada Border Services Agency
ⓘ
U.S. Customs and Border Protection ⓘ |
| overseenBy | International Boundary Commission ⓘ |
| partlyDefinedByParallel | 49th parallel north ⓘ |
| passesThrough |
forests
ⓘ
lakes ⓘ mountain ranges ⓘ prairies ⓘ rivers ⓘ rural areas ⓘ urban areas ⓘ |
| separates |
Canada
ⓘ
United States of America ⓘ
surface form:
United States
|
| usedFor |
tourism
ⓘ
trade ⓘ transportation ⓘ |
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: Canada–United States border Description of subject: The Canada–United States border is the world’s longest international land boundary, separating Canada and the United States across diverse terrains from the Atlantic to the Pacific and Arctic Oceans.
Referenced by (228)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
U.S. Route 99
this entity surface form:
Canada–United States border at Blaine
this entity surface form:
U.S.–Canada border
this entity surface form:
U.S.–Canada border in Clinton County
Le Haut-Saint-Laurent Regional County Municipality, Quebec
→
hasBorderFeature
→
Canada–United States border
ⓘ
subject surface form:
Le Haut-Saint-Laurent Regional County Municipality
subject surface form:
Fourth Connecticut Lake
this entity surface form:
U.S.–Canada border
this entity surface form:
Canadian border
this entity surface form:
Canada–United States land border in the Pacific Northwest
this entity surface form:
United States border
subject surface form:
Ferndale, Washington
this entity surface form:
United States–Canada border
United States military forces in the War of 1812
→
theaterOfOperations
→
Canada–United States border
ⓘ
this entity surface form:
Canadian–American border
this entity surface form:
United States border
this entity surface form:
Canada–United States land border
this entity surface form:
United States border