6521
Experiments were conducted to understand the mechanisms for C5a -induced IL-8 production , which was 14-fold greater than that in unstimulated cells by 2 hours.
 ( protein: IL-8, None) , ( cell type: unstimulated 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: IL-8, None) , ( cell type: unstimulated cells, None) 