Question: What is the tie number when the home team is Port Vale?
SQL: SELECT "Tie no" FROM "2-18711843-4" WHERE "Home team" = 'Port Vale';

Question: What is the score in the Liverpool home game?
SQL: SELECT "Score" FROM "2-18711843-4" WHERE "Home team" = 'Liverpool';

Question: Which away team has a tie number of 3?
SQL: SELECT "Away team" FROM "2-18711843-4" WHERE "Tie no" = '3';