Assertion: humpback whale's time | /r/CapableOf | accept terrestrial mammal
Facets:
value: fully
type: DEGREE
value: as the ancestor of all whales
type: OTHER
Source sentences:
text: Perhaps because even trained scientists have a hard time accepting a fully terrestrial mammal as the ancestor of all whales, for a while after its discovery in 1983, Pakicetus was described as having a semi-aquatic lifestyle.