<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_event_action(cls) -> Optional[str]: """Return the second part of the event_type e.g. """

        if not cls.actor:
            return None
        return event_context.get_event_action(cls.event_type)