What was the outcome on 13 may 2007?
CREATE TABLE "doubles_35_23_12" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score" text
);
SELECT "outcome" FROM "doubles_35_23_12" WHERE "date"='13 may 2007';