Assertion: killer whale's calf | /r/CapableOf | learn its repertoire of calls
Facets:
value: from its mother
type: OTHER
value: selectively
type: MANNER
Source sentences:
text: Vocal development studies at SeaWorld have determined that a calf learns its repertoire of calls selectively from its mother, even when other killer whales may be present and vocalize more frequently than the mother.