How many years for the team with under 31 ties and a percentage of 0.5451?
CREATE TABLE "ncaa_division_i_fbs_football_win_loss_re" (
  "mountain_west" text,
  "lost" real,
  "tied" real,
  "pct" real,
  "years" real,
  "total_games" real
);
SELECT "years" FROM "ncaa_division_i_fbs_football_win_loss_re" WHERE "tied"<31 AND "pct"=0.5451;