What is the nickname of staff with first name as Janessa and last name as Sawayn?
return staff ;return first names of #1 ;return #1 where #2 is  Janessa ;return last names of #1 ;return #1 where #4 is  Sawayn ;return nickname of both #3 and #5
['select', 'project', 'comparative', 'project', 'comparative', 'intersection']