6189
TNFalpha is a rapid activator of IL-8 gene expression by U937 , producing a 50-fold induction of mRNA within 1 hour of treatment.
 cell line: U937; DNA: IL-8 gene; RNA: mRNA; protein: TNFalpha; protein: IL-8
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: U937, IL-8 gene, mRNA, TNFalpha, IL-8 
Answer:
 cell line: U937; DNA: IL-8 gene; RNA: mRNA; protein: TNFalpha; protein: IL-8