Assertion: duck | /r/CapableOf | sleep with one eye
Facets:
value: literally
type: MANNER
Source sentences:
text: Ducks Can Sleep With One Eye Open One of the more fascinating duck facts is that they are able to literally sleep with one eye open!
text: Ducks usually sleep side by side in a long row, and scientists have found that the ducks at the end of the row will actually sleep with one eye open, specifically the one that is facing away from the row.