Question: What was the score of the Replay game when Watford was the away team?
SQL: SELECT "Score" FROM "2-17751837-5" WHERE "Tie no" = 'Replay' AND "Away team" = 'Watford';

Question: Who was the home team when Walsall was the away team?
SQL: SELECT "Home team" FROM "2-17751837-5" WHERE "Away team" = 'Walsall';