What is the year that the Men's 35 is NSW, Women's Open is QLD and the venue is Sydney?
CREATE TABLE "results_of_the_national_championships_19" (
  "year" real,
  "venue" text,
  "men_s_open" text,
  "women_s_open" text,
  "men_s_35s" text
);
SELECT "year" FROM "results_of_the_national_championships_19" WHERE "men_s_35s"='nsw' AND "venue"='sydney' AND "women_s_open"='qld';