Assertion: knee's joint | /r/CapableOf | allow bending
Facets:
Source sentences:
text: Condyloid or ellipsoidal joints are ball and socket joints that are elliptical rather than round, allowing bending and circular movement but rendering rotation impossible.
text: Hinge joints allow straightening, bending and flexing of joints.
text: A hinge joint is a type of synovial joint that works like the hinge on a door, allowing bending and straightening only.