1791
However, within the B-cell lineage , ERP is highly expressed primarily at early stages of B-lymphocyte development , and expression declines drastically upon B-cell maturation , correlating with the enhancer activity of the IgH pi site .
 DNA: IgH pi site; cell type: B-lymphocyte; protein: ERP; cell type: B-cell lineage
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: IgH pi site, B-lymphocyte, ERP, B-cell lineage 
Answer:
 DNA: IgH pi site; cell type: B-lymphocyte; protein: ERP; cell type: B-cell lineage