10023
Negative regulation by HLA-DO of MHC class II -restricted antigen processing .
 protein: MHC class II; protein: HLA-DO
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: MHC class II, HLA-DO 
Answer:
 protein: MHC class II; protein: HLA-DO