Find the distinct driver id and the stop number of all drivers that have a shorter pit stop duration than some drivers in the race with id 841.
return drivers ;return races of #1 ;return ids of #2 ;return #1 where #3 is 841 ;return pit stop durations of #4 ;return highest of #5 ;return pit stop durations of #1 ;return #1 where #7 is lower than #6 ;return driver id of #8 ;return stops of #8 ;return number of  #10 ;return #9 ,  #11
['select', 'project', 'project', 'comparative', 'project', 'aggregate', 'project', 'comparative', 'project', 'project', 'aggregate', 'union']