Assertion: manatee's teeth | /r/AtLocation | the front of their mouth
Facets:
value: slowly
type: MANNER
value: from the back
type: TRANSITIVE-OBJECT
Source sentences:
text: This is why manatees have an interesting biological function which is called “polyphyodonty”, which means their teeth that act like a conveyor belt and slowly move from the back to the front of their mouth as new teeth are needed to chew food.