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These data demonstrate that B95-8 cells contain a competitive inhibitor that prevents binding of dexamethasone to its cognate receptor .
 cell type: B95-8 cells; protein: cognate receptor
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: B95-8 cells, cognate receptor 
Answer:
 cell type: B95-8 cells; protein: cognate receptor