Assertion: boa constrictor | /r/HasProperty | primitive
Facets:
value: in anatomical and behavioral terms
type: OTHER
Source sentences:
text: In anatomical and behavioral terms, both pythons and boa constrictors are considered to be primitive.
text: Boa constrictors are a "primitive snake" which means they have two lungs instead of one and their skeletons still have a vestigial set of back legs and pelvic bones.