Assertion: sperm whale's flipper | /r/ObjectUse | used for steering
Facets:
value: mainly
type: DEGREE
Source sentences:
text: Whales swim by moving their tail fin and lower body up and down, propelling themselves through vertical movement, while their flippers are mainly used for steering.
text: They swim by moving their tail fin and lower body up and down, propelling themselves through vertical movement, while their flippers are mainly used for steering.
text: They swim by moving their tail fin and lower body up and down, propelling themselves through vertical movement, while their flippers are mainly used for steering.