Task: Text to Code
Input (English): Step 1: For each row in appellations table, find the corresponding rows in wine table.
Step 2: only keep the results of step 1 whose Year less than 2010.
Step 3: find the number of rows of each value of Area in the results of step 2.
Step 4: find Area of the results of step 2 with largest value in the results of step 3
Output (English): SELECT T1.Area FROM appellations AS T1 JOIN wine AS T2 ON T1.Appelation = T2.Appelation WHERE T2.Year < 2010 GROUP BY T1.Area ORDER BY Count ( * ) Desc LIMIT 1