Assertion: cassowary's wattle | /r/CapableOf | develop their striking colours
Facets:
Source sentences:
text: As the young mature, the plumage darkens, the wattles and casque start to grow, and the neck and wattles begin to develop their striking colours.
text: As the young mature, the plumage darkens, the wattles and casque start to grow and the neck and wattles begin to develop their striking colours.