Assertion: rheumatoid arthritis's system | /r/CapableOf | attack its own cells
Facets:
value: mistakenly
type: MANNER
value: for reasons
type: CAUSE
value: suddenly
type: MANNER
Source sentences:
text: For reasons poorly understood, the immune system will suddenly attack its own cells and tissues.
text: RA is an autoimmune condition, which means that a person’s immune system mistakenly attacks its own cells.