Assertion: knee pad | /r/HasProperty | worn on knee
Facets:
value: to protect them
type: PURPOSE
Source sentences:
text: Knee pads or kneepads are protective gear worn on knees to protect them against impact injury from falling to the ground or hitting an obstacle, or to provide padding for extended kneeling.
text: Knee pads designed for work are worn around the knee and some designs even protect the shin.