12877
Cytokines , IL-2 , IL-4 , IL-6 , IL-7 , IL-12 , and IL-15 are key regulators of human peripheral blood T and NK cell activation and differentiation but the precise mechanisms that give rise to their differential activities within these cells are not clear.
 protein: Cytokines; protein: IL-4; protein: IL-12; protein: IL-7; protein: IL-15; protein: IL-6; protein: IL-2
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: Cytokines, IL-4, IL-12, IL-7, IL-15, IL-6, IL-2 
Answer:
 protein: Cytokines; protein: IL-4; protein: IL-12; protein: IL-7; protein: IL-15; protein: IL-6; protein: IL-2