Howard Twitty was the runner-up of what tournament?
CREATE TABLE "pga_tour_wins_25" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "tournament" FROM "pga_tour_wins_25" WHERE "runner_s_up"='howard twitty';