Assertion: dolphin's eye | /r/HasProperty | closed
Facets:
Source sentences:
text: They only close one eye when they sleep; the left eye will be closed when the right half of the brain sleeps, and vice versa.
text: When it's time to rest, a dolphin will shut down only one hemisphere of its brain, and close the opposite eye (the left eye will be closed when the right half of the brain sleeps, and vice versa).