question: What is the area of the appelation that produces the highest number of wines before the year of 2010?
#1 return appelations 
#2 return wines #1 produces 
#3 return #2 before 2010 
#4 return number of  #3 for each #1 
#5 return #1 where #4 is  highest 
#6 return area of   #5