what is the mascot for the enrollment 08-09 of 320?
CREATE TABLE "membership" (
  "school" text,
  "location" text,
  "mascot" text,
  "num_county" text,
  "enrollment_08_09" real,
  "ihsaa_class" text,
  "year_joined" real,
  "previous_conference" text
);
SELECT "mascot" FROM "membership" WHERE "enrollment_08_09"=320;