Assertion: cetacean | /r/AtLocation | the surface
Facets:
value: to breathe
type: PURPOSE
value: intermittently
type: TEMPORAL
Source sentences:
text: When the cetacean comes to the surface and exhales, you can sometimes see the spout, or blow, which is the result of the warm air in the whale's lungs condensing upon reaching the cool air outside.
text: During diving, a muscular action closes the blowholes (nostrils), which remain closed until the cetacean comes to the surface; when it surfaces, the muscles open the blowholes and warm air is exhaled.
text: Cetaceans intermittently come to the surface in order to breathe during these sleep periods and exhibit logging behaviour.
text: Some species are capable of diving to great depths [commonly more than 5000 ft (1500 m) in the sperm whale], yet all cetaceans must come to the surface to breathe.