1129
Human RAR alpha was expressed in H9 , U937 and THP-1 cells , but almost undetectable in CEM cells .
 protein: Human RAR alpha; cell line: H9; cell line: THP-1 cells; cell line: CEM cells; cell line: U937
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: Human RAR alpha, H9, THP-1 cells, CEM cells, U937 
Answer:
 protein: Human RAR alpha; cell line: H9; cell line: THP-1 cells; cell line: CEM cells; cell line: U937