CREATE TABLE "champions_tour_wins_9" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);

Question: When was the winning score −9 (72-68-64-67=271)?
SQL: SELECT "date" FROM "champions_tour_wins_9" WHERE "winning_score"='−9 (72-68-64-67=271)';

Question: What was the margin of victory for the Mississippi Gulf Resort Classic?
SQL: SELECT "margin_of_victory" FROM "champions_tour_wins_9" WHERE "tournament"='mississippi gulf resort classic';

Question: What was the margin of victory when Mark Calcavecchia was the runner-up?
SQL: SELECT "margin_of_victory" FROM "champions_tour_wins_9" WHERE "runner_s_up"='mark calcavecchia';

Question: What was the date of the Ace Group Classic tournament with a 1 stroke margin of victory?
SQL: SELECT "date" FROM "champions_tour_wins_9" WHERE "margin_of_victory"='1 stroke' AND "tournament"='the ace group classic';

Question: What was the margin of victory when the winning score was −9 (72-68-64-67=271)?
SQL: SELECT "margin_of_victory" FROM "champions_tour_wins_9" WHERE "winning_score"='−9 (72-68-64-67=271)';