Assertion: frog's eyeball | /r/CapableOf | go down into his head
Facets:
Source sentences:
text: When a frog swallows, his eyeballs will close and go down into his head applying pressure and helping to force food down their throat.
text: A frog’s bulgy eyeballs will close and move down into its head when it swallows as the eyeballs push the food down its throat