Which Adelaide's Melbourne and Perth were yes when Auckland was no?
CREATE TABLE "1994" (
  "sydney" text,
  "melbourne" text,
  "perth" text,
  "adelaide" text,
  "gold_coast" text,
  "auckland" text
);
SELECT "adelaide" FROM "1994" WHERE "melbourne"='yes' AND "auckland"='no' AND "perth"='yes';