1071
Transcription factor requirements for U2 snRNA -encoding gene activation in B lymphoid cells .
 cell type: B lymphoid cells; RNA: U2 snRNA; protein: Transcription factor
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 type: B lymphoid cells; RNA: U2 snRNA; protein: Transcription factor