Assertion: northwest | /r/HasProperty | occupied by the united states
Facets:
value: until 1846
type: TEMPORAL
value: jointly
type: MANNER
Source sentences:
text: Originally claimed by Spain, Britain, Russia, and finally the United States, the Northwest was jointly occupied by Britain and the United States until 1846, when the 49th parallel was made the boundary between the United States and British-held Canada.