Assertion: viper's pair | /r/AtLocation | movable bones of the upper jaw
Facets:
Source sentences:
text: Vipers are characterized by a pair of long, hollow, venom-injecting fangs attached to movable bones of the upper jaw (the maxillaries) that are folded back in the mouth when not in use.
text: Vipers are characterized by a pair of long, hollow, venom-injecting fangs attached to movable bones of the upper jaw (the