Which IHSAA Class has a Size larger than 511?
CREATE TABLE "indiana_high_school_athletics_conference" (
  "school" text,
  "location" text,
  "mascot" text,
  "size" real,
  "ihsaa_class" text,
  "county" text
);
SELECT "ihsaa_class" FROM "indiana_high_school_athletics_conference" WHERE "size">511;