Assertion: bullfrog's leg | /r/ObjectUse | used for food
Facets:
value: previously
type: TEMPORAL
Source sentences:
text: Bullfrog legs are nearly twice as large as the legs of the native California Red-legged Frog that had previously been used for food, so frog hunters concentrated on catching the rapidly-expanding bullfrogs instead of red-legged frogs, but since red-legged frog legs were considered to have a much better taste than bullfrog legs, both frogs continued to be hunted.