In which championship did the winner have a score of −9 (66-69-73-71=279)?
CREATE TABLE "wins_7" (
  "year" real,
  "championship" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "championship" FROM "wins_7" WHERE "winning_score"='−9 (66-69-73-71=279)';