14191
Down syndrome ( DS ) and neuronal ceroid-lypofuscinosis ( NCL ) are clinically characterized by the premature onset of numerous features normally associated with human aging .
 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:
 None