Assertion: knee's joint | /r/HasProperty | extended
Facets:
Source sentences:
text: The two collateral ligaments prevent the knee from rotating when the joint is extended.
text: The extracapsular ligaments include two collateral ligaments that prevent the knee from rotating when the joint is extended—the fibular (lateral) collateral ligament and the tibial (medial) collateral ligament—and other ligaments.