Assertion: horse | /r/CapableOf | slip into rem sleep
Facets:
value: involuntarily
type: MANNER
Source sentences:
text: However, if a horse is never allowed to lie down, after several days it will become sleep-deprived, and in rare cases may suddenly collapse as it involuntarily slips into REM sleep while still standing.
text: However, if a horse is never allowed to lie down, after several days it will become sleep-deprived, and in rare cases may suddenly collapse as it involuntarily slips into REM sleep while still standing.