Assertion: bison | /r/CapableOf | roam river valleys
Facets:
value: from alaska
type: LOCATION
value: to mexico
type: TRANSITIVE-OBJECT
value: at the start of the 1800s
type: TEMPORAL
Source sentences:
text: At the start of the 1800s, about 60 million bison roamed the forests, plains, and river valleys from Alaska to Mexico.