Assertion: turtle's rib | /r/CapableOf | curve a kind of proto-shell
Facets:
value: around its back
type: LOCATION
Source sentences:
text: The striking thing about this prehistoric reptile is that it possessed wide, elongated ribs that curved around its back, a kind of "proto-shell" that one can easily imagine evolving (over the course of tens of millions of years) into the giant carapaces of Protostega and Meiolania.