Assertion: dinosaur's teeth | /r/CapableOf | reinforce ridge
Facets:
value: on the rear surface
type: LOCATION
Source sentences:
text: The premaxillary teeth, four per side at the front of the upper jaw, were closely packed, D-shaped in cross-section, had reinforcing ridges on the rear surface, were incisiform (their tips were chisel-like blades) and curved backwards.