1417
Activation of T helper cells results in coordinate expression of a number of cytokines involved in differentiation , proliferation and activation of the haematopoietic system .
 cell type: T helper cells; protein: cytokines
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell type: T helper cells; protein: cytokines