21635
The functional significance for activation of inflammatory transcription factors , such as signal transducer and activator of transcription ( STAT3 ) , nuclear factor ( NF ) kappa B or NF - interleukin ( IL ) 6 and their contribution to the induction of brain controlled sickness responses , such as fever , during infection and inflammation is unknown .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None