704
The HEL cells also exhibited a similar elevation of AhR mRNA level , when they had differentiated toward monocyte-macrophage cells by these combined inducers, but little change in the mRNA level was observed when the cells were induced to differentiate into other cell types.
 cell type: monocyte-macrophage cells; cell line: HEL cells; protein: AhR; RNA: AhR mRNA
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: monocyte-macrophage cells, HEL cells, AhR, AhR mRNA 
Answer:
 cell type: monocyte-macrophage cells; cell line: HEL cells; protein: AhR; RNA: AhR mRNA