Which women's doubles has Howard Bach Tony Gunawan as Men's doubles and Taufik Hidayat as Men's Singles?
CREATE TABLE "21st_century" (
  "year" real,
  "men_s_singles" text,
  "women_s_singles" text,
  "men_s_doubles" text,
  "women_s_doubles" text,
  "mixed_doubles" text
);
SELECT "women_s_doubles" FROM "21st_century" WHERE "men_s_doubles"='howard bach tony gunawan' AND "men_s_singles"='taufik hidayat';