Which Runner(s)-up has a Tournament of general foods pga seniors' championship?
CREATE TABLE "senior_pga_tour_wins_11" (
  "date" text,
  "tournament" text,
  "winning_score" text,
  "margin_of_victory" text,
  "runner_s_up" text
);
SELECT "runner_s_up" FROM "senior_pga_tour_wins_11" WHERE "tournament"='general foods pga seniors'' championship';