9891
Unlike Oct-1 , which is constitutively expressed in many cell types, Oct-2 expression is restricted primarily to B lymphocytes and can be induced in precursor B cells by stimulation with bacterial lipopolysaccharide ( LPS ).
 B lymphocytes, Oct-2, Oct-1, precursor B cells
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:
 B lymphocytes, Oct-2, Oct-1, precursor B cells