Who were the runner(s)-up when the winning score was –10 (69-68-74-67=278)?
CREATE TABLE "senior_pga_tour_wins_9" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "margin_of_victory" FROM "senior_pga_tour_wins_9" WHERE "winning_score"='–10 (69-68-74-67=278)';