CREATE TABLE table_203_593 (id DECIMAL, "tenure" TEXT, "coach" TEXT, "years" DECIMAL, "record" TEXT, "pct." DECIMAL, "ncaa tournament" DECIMAL)

what paul nix or hal baird coach in 1986 ?
SELECT "coach" FROM table_203_593 WHERE "coach" IN ('paul nix', 'hal baird') AND "tenure" <= 1986 AND "tenure" >= 1986
SELECT "coach" FROM "table_203_593" WHERE "coach" IN ('paul nix', 'hal baird') AND "tenure" <= 1986 AND "tenure" >= 1986