3309
Susceptibility of these transformed cell lines to NK cells was determined by cytolytic assays.
 cell type: NK cells; cell line: cell lines
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: NK cells, cell lines 
Answer:
 cell type: NK cells; cell line: cell lines