4635
This cellular system offers the advantage that MHC class II induction is studied in a "physiologic" cell lineage that, as a result of this expression within the thymus , is thought to participate to the selection and maturation of the T cells .
 cell type: "physiologic" cell lineage; cell type: T cells; protein: MHC class II
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: "physiologic" cell lineage, T cells, MHC class II 
Answer:
 cell type: "physiologic" cell lineage; cell type: T cells; protein: MHC class II