How many other goals did Dunne have in the season where he had 1 league goal?
CREATE TABLE "sheffield_united_statistics" (
  "season" text,
  "division" text,
  "league_apps" real,
  "league_goals" real,
  "fa_cup_apps" real,
  "fa_cup_goals" real,
  "other_apps" real,
  "other_goals" real,
  "total_apps" real,
  "total_goals" real
);
SELECT "other_goals" FROM "sheffield_united_statistics" WHERE "league_goals"=1;