Assertion: ferret | /r/CapableOf | sleep up to 18 hours
Facets:
value: a day
type: TEMPORAL
Source sentences:
text: In fact, they have been known to sleep up to 18 hours a day, and are most active at night, especially during dawn and dusk.
text: In fact, they have been known to sleep up to 18 hours a day, and are most active at night, especially during dawn and dusk.