How many championships have there been with Steffi Graf?
CREATE TABLE "grand_slam_7_finals_3_titles_4_runner_up" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "opponent_in_final" text,
  "score_in_final" text
);
SELECT "championship" FROM "grand_slam_7_finals_3_titles_4_runner_up" WHERE "opponent_in_final"='Steffi Graf';