Assertion: rheumatoid arthritis's joint | /r/LocatedNear | capsule
Facets:
Source sentences:
text: The joint is surrounded by a capsule that protects and supports it (see illustration).
text: The joint is surrounded by a capsule that protects and supports it.
text: A joint (the place where two bones meet) is surrounded by a capsule that protects and supports it.
text: The entire joint is surrounded by a capsule, known as the synovial sac .