Assertion: cetacean | /r/HasProperty | aware of their need for oxygen
Facets:
value: for oxygen
type: PURPOSE
value: always
type: DEGREE
Source sentences:
text: All cetaceans are considered conscious breathers which means they are always aware of their need for oxygen and never fall completely asleep because if they did there is a chance they would sink and drown or be attacked by an unsuspecting predator.