Assertion: platypus's ear | /r/HasProperty | slit
Facets:
value: on the sides of their heads
type: LOCATION
Source sentences:
text: The ears are slits on the sides of their heads that are usually unseen, as they are blanketed by their spines.
text: The echidnas' ears are slits on the sides of their heads that are usually unseen due to the fact that they are blanketed by their spines.