Assertion: primitive cetacean | /r/CapableOf | become aquatic
Facets:
value: fully
type: DEGREE
Source sentences:
text: The primitive cetaceans, or archaeocetes, first took to the sea approximately 49 million years ago and became fully aquatic by 5–10 million years later.
text: Primitive cetaceans, or archaeocetes, first took to the sea approximately 49 million years ago and became fully aquatic 5–10 million years later.