1269
EBV altered the activation responses of immature thymocytes in vitro.
 cell type: immature thymocytes
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: immature thymocytes 
Answer:
 cell type: immature thymocytes