3750
In contrast to MM cells , normal splenic B cells express dephosphorylated pRB .
 cell type: splenic B cells; protein: dephosphorylated pRB; protein: pRB; cell line: MM cells; 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: splenic B cells, dephosphorylated pRB, pRB, MM cells, B cells 
Answer:
 cell type: splenic B cells; protein: dephosphorylated pRB; protein: pRB; cell line: MM cells; cell type: B cells