9496
Repression of human immunodeficiency virus type 1 through the novel cooperation of human factors YY1 and LSF [published erratum appears in J Virol 1998 Feb;72(2):1709]
 LSF, human factors, YY1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 LSF, human factors, YY1