6013
Immune induction is effected through the interaction of antigen-presenting cells with specific receptors on the surface of thymus-derived lymphocytes .
 cell type: thymus-derived lymphocytes; cell type: lymphocytes; cell type: antigen-presenting cells; protein: receptors
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: thymus-derived lymphocytes, lymphocytes, antigen-presenting cells, receptors 
Answer:
 cell type: thymus-derived lymphocytes; cell type: lymphocytes; cell type: antigen-presenting cells; protein: receptors