How many passes did Aikman not complete in the first half?
return Aikman ;return passes of #1 ;return #2 in  the  first half ;return #3 that Aikman completes ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']