What is the id and stop number for each driver that has a shorter pit stop than the driver in the race with id 841?
return drivers ;return races of #1 ;return ids of #2 ;return #1 where #3 is  841 ;return the   pit stop  of #4 ;return the   pit stops of #1 ;return #1 where #6 is  shorter than  #5 ;return the   ids of #7 ;return the   stop  numbers of #7 ;return #8 ,  #9
['select', 'project', 'project', 'comparative', 'project', 'project', 'comparative', 'project', 'project', 'union']