Which surface has a Date of 5 november 2011?
CREATE TABLE "singles_6_4_titles_2_runners_up" (
  "outcome" text,
  "date" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT "surface" FROM "singles_6_4_titles_2_runners_up" WHERE "date"='5 november 2011';