Name the average attendance with result of won 2-0 on 2 november 2007
CREATE TABLE "conference_national" (
  "date" text,
  "opponent" text,
  "venue" text,
  "result" text,
  "attendance_away" real
);
SELECT AVG("attendance_away") FROM "conference_national" WHERE "result"='won 2-0' AND "date"='2 november 2007';