417
High levels of cytokine gene expression in T cells also required both TCR and costimulatory signals .
 cell type: T cells; protein: cytokine; protein: TCR
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: T cells, cytokine, TCR 
Answer:
 cell type: T cells; protein: cytokine; protein: TCR