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Recently, it has been shown that RelB knockout mice have no dendritic cells ( DC ).
 cell type: DC; cell type: dendritic cells; protein: RelB
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: DC, dendritic cells, RelB 
Answer:
 cell type: DC; cell type: dendritic cells; protein: RelB