What is the women's singles before 1965 with kaj lindfors ann-louise von essen being mixed doubles?
CREATE TABLE "past_winners" (
  "year" real,
  "men_s_singles" text,
  "women_s_singles" text,
  "men_s_doubles" text,
  "women_s_doubles" text,
  "mixed_doubles" text
);
SELECT "women_s_singles" FROM "past_winners" WHERE "year"<1965 AND "mixed_doubles"='kaj lindfors ann-louise von essen';