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Here we show that in a MPC11 plasmacytoma x fibroblast environment , the IgH 3' enhancer is transcriptionally inactive.
 cell line: MPC11 plasmacytoma x fibroblast environment; DNA: IgH 3' enhancer
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: MPC11 plasmacytoma x fibroblast environment, IgH 3' enhancer 
Answer:
 cell line: MPC11 plasmacytoma x fibroblast environment; DNA: IgH 3' enhancer