Assertion: horse | /r/CapableOf | sleep
Facets:
value: because of the "stay apparatus"
type: CAUSE
Source sentences:
text: Horses are able to sleep standing up because a "stay apparatus" in their legs allows them to relax their muscles and doze without collapsing.
text: Related to this need to flee from predators in the wild is an unusual trait: horses are able to sleep both standing up and lying down, with younger horses tending to sleep significantly more than adults.
text: Horses are able to sleep standing up because of the "stay apparatus" ingrained in their leg anatomy.
text: Horses are able to sleep both standing up and lying down.