13348
Detailed histogenetic characterization of these novel PEL cell lines suggests that PEL may derive from a post-germinal centre B cell which has undergone pre-terminal differentiation .
 ( cell line: PEL, None) , ( cell line: post-germinal centre B cell, None) , ( cell line: PEL cell lines, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: PEL, None) , ( cell line: post-germinal centre B cell, None) , ( cell line: PEL cell lines, None) 