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T cell-specific negative regulation of transcription of the human cytokine IL-4 .
 protein: human cytokine IL-4
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: human cytokine IL-4