When did the staff member with first name as Janessa and last name as Sawayn join the company?
return staff member ;return first name  of  #1 ;return #1 where #2 is  Janessa ;return last name  of  #1 ;return #1 where #4 is  Sawayn ;return #1 in both #3 and  #5 ;return When #6 join company
['select', 'project', 'comparative', 'project', 'comparative', 'intersection', 'project']