9861
OBJECTIVE: We investigated the production of IL-5 , a potent growth factor and chemotactic factor for eosinophils , by CD4+ T lymphocytes in patients with asthma .
 ( protein: IL-5, None) , ( cell type: CD4+ T lymphocytes, None) , ( cell type: eosinophils, 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: IL-5, None) , ( cell type: CD4+ T lymphocytes, None) , ( cell type: eosinophils, None) 