Table schema:
CREATE TABLE WINE (Appelation VARCHAR, year VARCHAR); CREATE TABLE APPELLATIONS (Area VARCHAR, Appelation VARCHAR)

Question: What is the area of the appelation that produces the highest number of wines before the year of 2010?
SQL: SELECT T1.Area FROM APPELLATIONS AS T1 JOIN WINE AS T2 ON T1.Appelation = T2.Appelation GROUP BY T2.Appelation HAVING T2.year < 2010 ORDER BY COUNT(*) DESC LIMIT 1