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We now demonstrate that B7 , but not LFA-3 , strongly costimulated IL-2 transcription and mRNA expression in CD4+ T cells .
 protein: B7; protein: LFA-3; protein: IL-2; cell line: CD4+ T 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: B7, LFA-3, IL-2, CD4+ T cells 
Answer:
 protein: B7; protein: LFA-3; protein: IL-2; cell line: CD4+ T cells