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Interestingly, PIF was constitutively activated in human T-cell leukemia virus type 1 -transformed MT-2 cells .
 cell line: human T-cell leukemia virus type 1 -transformed MT-2 cells; protein: PIF
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: human T-cell leukemia virus type 1 -transformed MT-2 cells, PIF 
Answer:
 cell line: human T-cell leukemia virus type 1 -transformed MT-2 cells; protein: PIF