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We therefore investigated whether NF-kappaB /Rel proteins are expressed in human neutrophils , as well as their fate on cell activation.
 protein: NF-kappaB /Rel proteins; cell type: neutrophils; cell type: human neutrophils; protein: NF-kappaB
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: NF-kappaB /Rel proteins, neutrophils, human neutrophils, NF-kappaB 
Answer:
 protein: NF-kappaB /Rel proteins; cell type: neutrophils; cell type: human neutrophils; protein: NF-kappaB