Who is the 2005 World AIDS Day Benefit "Dream" Cast when the Original Australian performer is Susan-Ann Walker?
CREATE TABLE "characters_casts_and_recordings" (
  "character" text,
  "original_broadway_performer" text,
  "original_australian_performer" text,
  "original_west_end_performer" text,
  "2005_world_aids_day_benefit_dream_cast" text
);
SELECT "2005_world_aids_day_benefit_dream_cast" FROM "characters_casts_and_recordings" WHERE "original_australian_performer"='Susan-Ann Walker';