Who played women's singles in 2002?
CREATE TABLE "canadian_open" (
  "year" text,
  "men_s_singles" text,
  "women_s_singles" text,
  "men_s_doubles" text,
  "women_s_doubles" text,
  "mixed_doubles" text
);
SELECT "women_s_singles" FROM "canadian_open" WHERE "year"='2002';