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Similarly, interferons could act on APL cells , alone or in combination with all-trans retinoic acid ( RA ), especially if the PML/RAR alpha fusion transcript that results from the t(15; 17) is induced by interferon .
 protein: PML/RAR alpha; cell type: APL cells; DNA: t(15; 17); RNA: PML/RAR alpha fusion transcript; protein: interferon
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: PML/RAR alpha, APL cells, t(15; 17), PML/RAR alpha fusion transcript, interferon 
Answer:
 protein: PML/RAR alpha; cell type: APL cells; DNA: t(15; 17); RNA: PML/RAR alpha fusion transcript; protein: interferon