What is Tournament, when Margin is Victory of 6 Strokes?
CREATE TABLE "sunshine_tour_wins_6" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "tournament" FROM "sunshine_tour_wins_6" WHERE "margin_of_victory"='6 strokes';