Assertion: platypus's jaw | /r/HasProperty | upper
Facets:
Source sentences:
text: As the adult platypus does not have teeth, it grinds its food between two bony plates on its upper and lower jaws and swallows this mashed up food.
text: As the adult platypus does not have teeth, it grinds its food between two bony plates on its upper and lower jaws for about 10 to 20 seconds and swallows this mashed up food.