Assertion: cassowary's feather | /r/HasSubevent | head
Facets:
Source sentences:
text: Thick black feathers cover their bodies, from which a blue-and-red neck protrudes, leading to a head adorned with a keratin crest called a casque (which is itself shrouded in mystery).
text: Thick black feathers cover their bodies, from which a cobalt blue and vibrant red neck protrudes, leading to a head adorned with a keratin “casque,” or crest.