Assertion: plesiosaur's body | /r/CapableOf | serve as an attachment surface
Facets:
value: for large muscle groups
type: TRANSITIVE-OBJECT
Source sentences:
text: To power the flippers, the shoulder girdle and the pelvis had been greatly modified, developing into broad bone plates at the underside of the body, which served as an attachment surface for large muscle groups, able to pull the limbs downwards.