Assertion: vegan's diet | /r/CapableOf | introduce environmental justification
Facets:
value: for going vegetarian
type: PURPOSE
value: in 1971
type: TEMPORAL
Source sentences:
text: In 1971, Diet for a Small Planet by the social policy activist Frances Moore Lappé introduced an environmental justification for going vegetarian or vegan to a global audience (it eventually sold more than 3m copies).