12922
The observation that human herpesvirus 6 ( HHV-6 ) can induce CD4 gene transcription and expression in CD4(-) cells was reported several years ago (P.Lusso, A.De Maria, M.Malnati, F.Lori, S.E.DeRocco, M. Baseler, and R.C.Gallo, Nature 349:533-535, 1991) and subsequently confirmed (P.Lusso, M.S.Malnati, A.Garzino-Demo, R.W.Crowley, E. O.Long, and R.C.Gallo, Nature 362:458-462, 1993; G.Furlini, M. Vignoli, E.Ramazzotti, M.C.Re, G.Visani, and M.LaPlaca, Blood 87:4737-4745, 1996).
 DNA: CD4 gene; cell line: CD4(-) cells
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: CD4 gene, CD4(-) cells 
Answer:
 DNA: CD4 gene; cell line: CD4(-) cells