Assertion: killer whale's mother | /r/CapableOf | give birth
Facets:
value: to a single calf
type: TRANSITIVE-OBJECT
value: after a 17-month pregnancy
type: TEMPORAL
Source sentences:
text: Mothers give birth every three to ten years, after a 17-month pregnancy.
text: Mothers give birth (usually to a single calf) once every five years or so.