if an event is required for a process then that event must occur before that process can occur
risk_event is not event. obligation_creating_event is creation_event. facilitating is not event. producing_organized_event is not performing. creation_event is not creation_or_destruction_event. producing_organized_event is performing. obligation_creating_event is not creation_event. producing_organized_event is production. producing_organized_event is not production. facilitating is event.