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c-myc RNA , which is constitutively expressed in RWLeu-4 cells , increased after 0.5 h of treatment with 50 nM VD3 and then rapidly decreased to barely detectable levels after 4 h of treatment.
 RNA: c-myc RNA; cell line: RWLeu-4 cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 RNA: c-myc RNA; cell line: RWLeu-4 cells