Assertion: legume | /r/HasProperty | major source of protein
Facets:
value: for the human race
type: TRANSITIVE-OBJECT
value: in the diet
type: LOCATION
value: since prehistoric ages
type: TEMPORAL
value: for more than 5000 years
type: TEMPORAL
Source sentences:
text: Legumes have been a major source of protein in the diet for more than 5000 years, according to the University of Minnesota Extension.
text: Legumes have been a major source of nutrition for the human race since prehistoric ages.