What is id of the staff who had a Staff Department Assignment earlier than any Clerical Staff?
return Clerical Staff ;return Staff Department Assignment of #1 ;return when  was  #2 ;return the  lowest of #3 ;return staff besides  #1 ;return Staff Department Assignment of #5 ;return when  was  #6 ;return #5 where #7 is lower than #4 ;return id of #8
['select', 'project', 'project', 'aggregate', 'discard', 'project', 'project', 'comparative', 'project']