1877
Epstein-Barr virus ( EBV ) replicative gene expression in tumour cells of AIDS-related non-Hodgkin's lymphoma in relation to CD4 cell number and antibody titres to EBV .
 cell type: tumour cells; protein: CD4
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: tumour cells, CD4 
Answer:
 cell type: tumour cells; protein: CD4