5913
Rheumatoid arthritis ( RA ) is a chronic autoimmune inflammatory disease in which unknown arthrogenic autoantigen is presented to CD4 + T cells .
 ( protein: arthrogenic autoantigen, None) , ( protein: CD4, None) , ( cell type: CD4 + T cells, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: arthrogenic autoantigen, None) , ( protein: CD4, None) , ( cell type: CD4 + T cells, None) 