11622
The observed E1a reiterations provide a model to gain insight into understanding the evolutionary events of some, if not all, adenovirus types during many years of symbiotic, persistent relationship in human tonsils and adenoids and possibly other lymphoid organs .
 ( DNA: E1a reiterations, 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:
 ( DNA: E1a reiterations, None) 