When Tom Watson (5/6) won the Senior British Open who won the Senior PGA Championship?
CREATE TABLE "senior_major_winners" (
  "year" real,
  "senior_pga_championship" text,
  "the_tradition" text,
  "senior_players_championship" text,
  "u_s_senior_open" text,
  "senior_british_open" text
);
SELECT "senior_pga_championship" FROM "senior_major_winners" WHERE "senior_british_open"='tom watson (5/6)';