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Consistent with findings obtained with transient expression assays , we observed marked accumulation of the transcription factor NF-kappa B in the nucleus of Namalwa B lymphoid cells , which constitutively express Tax .
 cell line: Namalwa B lymphoid cells; protein: transcription factor NF-kappa B; protein: Tax; protein: NF-kappa B
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell line: Namalwa B lymphoid cells; protein: transcription factor NF-kappa B; protein: Tax; protein: NF-kappa B