Assertion: osteoarthritis | /r/Causes | cartilage
Facets:
Source sentences:
text: Osteoarthritis causes cartilage — the hard, slippery tissue that covers the ends of bones where they form a joint — to break down.
text: It causes the cartilage that surrounds the joint to thin and become rough.
text: Osteoarthritis causes cartilage, the hard, slippery tissue that covers the ends of bones where they form a joint, to break down.