Assertion: elbow's joint | /r/HasProperty | a type of synovial joint
Facets:
Source sentences:
text: A ball and socket joint is a type of synovial joint that allows movement in almost every direction.
text: Hinge and pivot joints are both types of synovial joint.
text: Hinge joints are a type of synovial joint that permit movement in one direction like the hinge on a door.