Assertion: platypus's spur | /r/HasProperty | essential
Facets:
value: according to the australian platypus conservatory
type: OTHER
value: to the male platypuses
type: TRANSITIVE-OBJECT
Source sentences:
text: According to the Australian Platypus Conservatory, the poison venom and the spurs are essential to the male platypuses while they ate striving to breed.