Assertion: yam's root | /r/HasProperty | important foods
Facets:
value: in the past
type: TEMPORAL
value: for indigenous peoples
type: TRANSITIVE-OBJECT
value: for thousands of years
type: TEMPORAL
Source sentences:
text: Hearty and nourishing, roots and tubers have been important foods for thousands of years.
text: In the past the roots of these daisies were an important food source for indigenous peoples.