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This is in contrast to the infection in B cells where the genome can circularize within 24 hr of infection.
 cell type: B 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: B cells 
Answer:
 cell type: B cells