6386
The inflammatory mediators lipopolysaccharide ( LPS ) and tumor necrosis factor ( TNF ) are potent activators of NF-kappaB .
 ( protein: tumor necrosis factor, None) , ( protein: TNF, None) , ( protein: NF-kappaB, 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: tumor necrosis factor, None) , ( protein: TNF, None) , ( protein: NF-kappaB, None) 