Assertion: gang gang cockatoo | /r/HasProperty | callocephalon
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Source sentences:
text: According to most authorities, the second clade includes the black palm cockatoo (Probosciger), the grey and reddish galah (Eolophus), the gang-gang cockatoo (Callocephalon) and the pinkish Major Mitchell's cockatoo (Lophochroa), although Probosciger is sometimes placed basal to all other species.