Did Elizabeth respond to Gebhard before or after the assassination of Prince William?
return Elizabeth responds to Gebhard ;return the  assassination of Prince William ;return when  was  #1 ;return when  was  #2 ;return if #3 is lower than #4 ;return if #3 is higher than #4 ;return which is true of #5 ,  #6
['select', 'select', 'project', 'project', 'boolean', 'boolean', 'comparison']