Assertion: rheumatoid arthritis | /r/HasProperty | systemic autoimmune disease
Facets:
Source sentences:
text: Rheumatoid arthritis (RA) is a systemic autoimmune disease that affects the entire body.
text: If there's no injury, joint pain is usually due to either rheumatoid arthritis (RA), a systemic autoimmune disease in which an overactive immune system attacks healthy cells, or osteoarthritis (OA), a degenerative disease in which a particular joint is ground down by injury or overuse.