8920
IFN-alpha also sensitized T cells to IL-2 -induced proliferation , further suggesting that IFN-alpha may be involved in the regulation of T-cell mitogenesis .
 protein: IL-2; protein: IFN-alpha; protein: IFN-alpha; cell line: sensitized T cells
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: IL-2, IFN-alpha, IFN-alpha, sensitized T cells 
Answer:
 protein: IL-2; protein: IFN-alpha; protein: IFN-alpha; cell line: sensitized T cells