12981
Tobacco smoke ( TS ) exposure is a major risk factor for human disease , and macrophages of healthy smokers have a depressed capacity to release cytokines , including tumor necrosis factor (TNF)alpha .
 ( protein: cytokines, None) , ( protein: tumor necrosis factor (TNF)alpha, None) , ( cell type: macrophages, 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: cytokines, None) , ( protein: tumor necrosis factor (TNF)alpha, None) , ( cell type: macrophages, None) 