For each year, return the year and the number of times the team Boston Red Stockings won in the postseasons.
return team ;return #1 that  is  Boston Red Stockings ;return times #2 won ;return #3 in postseason ;return number of  #4 for each year ;return year of #5 ;return #6 ,  #5
['select', 'filter', 'project', 'filter', 'group', 'project', 'union']