13616
The data show that unstimulated human peripheral B cells express mRNA of the RA receptor alpha , beta , and gamma .
 cell type: unstimulated human peripheral 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: unstimulated human peripheral B cells 
Answer:
 cell type: unstimulated human peripheral B cells