1706
In conclusion, E1A expression marks cells for destruction by the host NK cell response , whereas the E7 oncoprotein lacks this activity.
 protein: E7; protein: E1A; protein: E7 oncoprotein; cell type: NK cell
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: E7; protein: E1A; protein: E7 oncoprotein; cell type: NK cell