Assertion: spider monkey's thumb | /r/HasProperty | absent
Facets:
Source sentences:
text: The Spider Monkey has hooked-shaped hands because its thumbs are either absent or reduced to a stump.
text: Since the thumb is absent, the Spider monkeys grooming is not as developed as in other primates.
text: Since the thumb is absent, grooming is not full-fledged as seen in the case of other monkeys.
text: Since the thumb is absent, the Spider monkey’s grooming is not as developed as in other primates.