Assertion: rheumatoid arthritis's system | /r/CapableOf | attack the synovium
Facets:
value: in rheumatoid arthritis
type: LOCATION
Source sentences:
text: When the immune system attacks the synovium, inflammation ensues, an excess of synovial fluid is produced, and the joint swells.
text: In rheumatoid arthritis, the immune system attacks the synovium, a tissue that lines the inside of the joints and produces a lubricating fluid that helps the joints move easily and smoothly.