CREATE TABLE "past_winners" (
  "year" text,
  "men_s_singles" text,
  "women_s_singles" text,
  "men_s_doubles" text,
  "women_s_doubles" text,
  "mixed_doubles" text
);

Question: Who won the Women's doubles the year that there was no competition in both the Men's doubles and the Men's singles?
SQL: SELECT "women_s_doubles" FROM "past_winners" WHERE "men_s_doubles"='no competition' AND "men_s_singles"='no competition';

Question: What year was there no competition in Women's singles?
SQL: SELECT "year" FROM "past_winners" WHERE "women_s_singles"='no competition';

Question: Who won the Women's doubles in 2001?
SQL: SELECT "women_s_doubles" FROM "past_winners" WHERE "year"='2001';

Question: Who won the Women's doubles the year that there was no competition in the Men's doubles and Arthur Chatschatourow won the Men's singles?
SQL: SELECT "women_s_doubles" FROM "past_winners" WHERE "men_s_doubles"='no competition' AND "men_s_singles"='arthur chatschatourow';