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IL-4 secreted by activated T cells is a pleiotropic cytokine affecting growth and differentiation of diverse cell types such as T cells , B cells , and mast cells .
 protein: IL-4; cell type: T cells; protein: pleiotropic cytokine; cell type: mast cells; cell type: activated T cells; cell type: B cells
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:
 protein: IL-4; cell type: T cells; protein: pleiotropic cytokine; cell type: mast cells; cell type: activated T cells; cell type: B cells