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IL-5 also stimulates GTP binding to p21ras .
 protein: p21ras; protein: IL-5
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: p21ras, IL-5 
Answer:
 protein: p21ras; protein: IL-5