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The Epstein-Barr virus protein EBNA2 acts as a transcriptional activator of cellular and viral genes and plays a crucial role in the immortalization of human primary B-cells by EBV .
 protein: transcriptional activator; cell type: human primary B-cells; protein: Epstein-Barr virus protein EBNA2
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: transcriptional activator, human primary B-cells, Epstein-Barr virus protein EBNA2 
Answer:
 protein: transcriptional activator; cell type: human primary B-cells; protein: Epstein-Barr virus protein EBNA2