Assertion: female manatee | /r/CapableOf | give birth to one calf
Facets:
value: at a time
type: TEMPORAL
value: usually
type: TEMPORAL
Source sentences:
text: A female manatee usually gives birth to one calf every 2-5 years.
text: Female African manatees give birth to one calf at a time after about a 13-month pregnancy.