Assertion: yam's tuber | /r/CapableOf | serve as food
Facets:
value: during famine
type: TEMPORAL
value: for local peoples
type: TRANSITIVE-OBJECT
Source sentences:
text: The tubercle-covered tuber, resembling an elephant’s foot or a tortoise shell, once served as a food for local peoples during famine (hence the name “Hottentot bread”).