13071
In contrast, minimal or no activation of Stat3beta was observed, suggesting that IL-2 and IL-15 predominantly activate Stat3alpha in human CD4(+) T cells .
 cell type: human CD4(+) T cells; protein: Stat3beta; protein: Stat3alpha; protein: IL-15; protein: IL-2
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: human CD4(+) T cells, Stat3beta, Stat3alpha, IL-15, IL-2 
Answer:
 cell type: human CD4(+) T cells; protein: Stat3beta; protein: Stat3alpha; protein: IL-15; protein: IL-2