14567
Adenovirus E1A inhibits IFN -induced resistance to cytolysis by natural killer cells .
 protein: IFN; cell type: natural killer 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: IFN, natural killer cells 
Answer:
 protein: IFN; cell type: natural killer cells