By how many years did the marriage age for women and men differ in 1982?
return women ;return marriage age of #1 ;return #2 in  1982 ;return men ;return marriage age of #4 ;return #5 in  1982 ;return difference of #3 and  #6
['select', 'project', 'filter', 'select', 'project', 'filter', 'arithmetic']