Western Hemisphere
E17047
The Western Hemisphere is the half of Earth that lies west of the Prime Meridian and east of the 180th meridian, encompassing the Americas and parts of western Europe and Africa.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Western Hemisphere canonical | 491 |
| Western Hemisphere globe | 1 |
| Western Hemisphere is closed to future European colonization | 1 |
| Western hemisphere | 1 |
| the Western Hemisphere | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T16808 — 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: Western Hemisphere Context triple: [North America, locatedInHemisphere, Western Hemisphere]
-
A.
North America
North America is a large continent in the Northern and Western Hemispheres that includes countries such as the United States, Canada, and Mexico.
-
B.
Eastern Hemisphere
The Eastern Hemisphere is the half of Earth that lies east of the Prime Meridian and west of the 180th meridian, encompassing most of Europe, Africa, Asia, and Australia.
-
C.
Latin America
Latin America is a culturally diverse region of the Americas, spanning Mexico, Central and South America, and much of the Caribbean, where Romance languages—primarily Spanish and Portuguese—predominate.
-
D.
South America
South America is a vast, predominantly Spanish- and Portuguese-speaking continent in the Western Hemisphere known for the Amazon rainforest, Andes Mountains, and rich cultural and ecological diversity.
-
E.
Northern Hemisphere
The Northern Hemisphere is the half of Earth lying north of the equator, containing most of the planet’s landmass, population, and many of its major continents and climate zones.
- 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: Western Hemisphere Target entity description: The Western Hemisphere is the half of Earth that lies west of the Prime Meridian and east of the 180th meridian, encompassing the Americas and parts of western Europe and Africa.
-
A.
North America
North America is a large continent in the Northern and Western Hemispheres that includes countries such as the United States, Canada, and Mexico.
-
B.
Eastern Hemisphere
The Eastern Hemisphere is the half of Earth that lies east of the Prime Meridian and west of the 180th meridian, encompassing most of Europe, Africa, Asia, and Australia.
-
C.
Latin America
Latin America is a culturally diverse region of the Americas, spanning Mexico, Central and South America, and much of the Caribbean, where Romance languages—primarily Spanish and Portuguese—predominate.
-
D.
South America
South America is a vast, predominantly Spanish- and Portuguese-speaking continent in the Western Hemisphere known for the Amazon rainforest, Andes Mountains, and rich cultural and ecological diversity.
-
E.
Northern Hemisphere
The Northern Hemisphere is the half of Earth lying north of the equator, containing most of the planet’s landmass, population, and many of its major continents and climate zones.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
geographical region
ⓘ
hemisphere of Earth ⓘ |
| boundedBy |
180th meridian
ⓘ
Prime Meridian ⓘ |
| centeredOn | Americas ⓘ |
| contains |
Amazon River
ⓘ
Andes ⓘ
surface form:
Andes Mountains
Arctic Ocean ⓘ Atlantic Ocean ⓘ Greenwich Mean Time−offset time zones ⓘ Mississippi River ⓘ Pacific Ocean ⓘ Rocky Mountains ⓘ Sahara Desert ⓘ
surface form:
Sahara Desert (western part)
Southern Ocean ⓘ |
| containsCountries |
Algeria
ⓘ
surface form:
Algeria (western part)
Argentina ⓘ Brazil ⓘ Canada ⓘ Iceland ⓘ Ireland ⓘ Mexico ⓘ Morocco (western part) ⓘ Portugal ⓘ Spain ⓘ United Kingdom (western part) ⓘ United States of America ⓘ
surface form:
United States
|
| coordinateSystem | Earth longitude-latitude grid ⓘ |
| definedBy | longitudinal boundaries ⓘ |
| geodesicDefinition | all points on Earth with longitudes between 0°W/0°E and 180°W/180°E ⓘ |
| includes |
Caribbean
ⓘ
Central America ⓘ Greenland ⓘ North America ⓘ South America ⓘ parts of Antarctica ⓘ parts of Western Africa ⓘ parts of Western Europe ⓘ |
| liesEastOf | 180th meridian ⓘ |
| liesWestOf | Prime Meridian ⓘ |
| majorLandmasses |
Americas
ⓘ
Greenland ⓘ western parts of Africa ⓘ western parts of Eurasia ⓘ |
| oppositeOf | Eastern Hemisphere ⓘ |
| timeStandardReference | Greenwich Mean Time ⓘ |
| usedIn |
cartography
ⓘ
geography ⓘ geopolitics ⓘ |
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: Western Hemisphere Description of subject: The Western Hemisphere is the half of Earth that lies west of the Prime Meridian and east of the 180th meridian, encompassing the Americas and parts of western Europe and Africa.
Referenced by (495)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Wilmington, Massachusetts
Inter-American Conference on Problems of War and Peace
→
appliesToJurisdiction
→
Western Hemisphere
ⓘ
Protocol of Washington to the Charter of the Organization of American States
→
geopoliticalScope
→
Western Hemisphere
ⓘ
subject surface form:
Campo Grande (Recife)
subject surface form:
Western Cuba
this entity surface form:
Western Hemisphere globe