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Although anti-CD3 alone or fibronectin alone cannot induce IL-2 message by CD4 cells , the combination of anti-CD3 plus fibronectin induced IL-2 message by CD4 cells .
 protein: anti-CD3; protein: fibronectin; protein: anti-CD3; cell line: CD4 cells; cell line: CD4 cells; protein: IL-2; protein: fibronectin; protein: IL-2
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: anti-CD3; protein: fibronectin; protein: anti-CD3; cell line: CD4 cells; cell line: CD4 cells; protein: IL-2; protein: fibronectin; protein: IL-2