question: For each year, return the year and the number of times the team Boston Red Stockings won in the postseasons.
#1 return team 
#2 return #1 that  is  Boston Red Stockings 
#3 return times #2 won 
#4 return #3 in postseason 
#5 return number of  #4 for each year 
#6 return year of #5 
#7 return #6 ,  #5