What is the date of the tournament played in Madrid, Spain?
CREATE TABLE "wta_tour_singles_finals_19_7_12" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "date" FROM "wta_tour_singles_finals_19_7_12" WHERE "tournament"='madrid, spain';