Assertion: crab's mouth | /r/AtLocation | the base of the legs
Facets:
Source sentences:
text: The middle segment of each leg is covered with spines used to chew food before it is passed forward and into the mouth located at the base of the legs.
text: They feed through the mouth located at the base of the legs, which are covered with thick bristles (gnathobases) that point inward used to grind the food as the animal walks.