3653
Furthermore both childrens' T cells were unable to produce the cytokines IL-2 , interferon-gamma ( IFN-gamma ), IL-4 and tumor necrosis factor-alpha ( TNF-alpha ).
 ( protein: IL-2, None) , ( protein: TNF-alpha, None) , ( protein: tumor necrosis factor-alpha, None) , ( protein: IL-4, None) , ( protein: IFN-gamma, None) , ( cell type: T cells, None) , ( protein: interferon-gamma, None) , ( protein: cytokines, 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-2, None) , ( protein: TNF-alpha, None) , ( protein: tumor necrosis factor-alpha, None) , ( protein: IL-4, None) , ( protein: IFN-gamma, None) , ( cell type: T cells, None) , ( protein: interferon-gamma, None) , ( protein: cytokines, None) 