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B-cell immortalization by Epstein-Barr virus ( EBV ) is dependent on permanent control of the cellular processes which normally regulate cell division and apoptosis , functions possessed by p53 in a number of normal cell types.
 cell type: B-cell; protein: p53
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: B-cell, p53 
Answer:
 cell type: B-cell; protein: p53