What is the area of the appelation that produces the highest number of wines before the year of 2010?
return appelations ;return wines #1 produces ;return #2 before 2010 ;return number of  #3 for each #1 ;return #1 where #4 is  highest ;return area of   #5
['select', 'project', 'filter', 'group', 'superlative', 'project']