1187
The cell lines exhibit a low level of constitutive TNF mRNA expression .
 cell line: cell lines; protein: TNF; RNA: TNF mRNA
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:
 cell line: cell lines; protein: TNF; RNA: TNF mRNA