Name the average fall 07 for fall 07 more than 219
CREATE TABLE "geography_of_students" (
  "maryland_counties" text,
  "fall_05" real,
  "fall_06" real,
  "fall_07" real,
  "fall_08" real,
  "fall_09" real
);
SELECT AVG("fall_07") FROM "geography_of_students" WHERE "fall_06">219;