What is the birth date of the person who died on 18 October 1335?
CREATE TABLE "queens_of_bohemia" (
  "father" text,
  "birth" text,
  "marriage" text,
  "became_queen" text,
  "ceased_to_be_queen" text,
  "death" text,
  "spouse" text
);
SELECT "birth" FROM "queens_of_bohemia" WHERE "death"='18 october 1335';