CREATE TABLE "first_round_proper" (
  "tie_no" text,
  "home_team" text,
  "score" text,
  "away_team" text,
  "attendance" text
);

Question: What was the attendance when the Southend United was the home team?
SQL: SELECT "attendance" FROM "first_round_proper" WHERE "home_team"='southend united';

Question: Who was the away team that played Northampton Town at home with a tie number of replay?
SQL: SELECT "away_team" FROM "first_round_proper" WHERE "tie_no"='replay' AND "home_team"='northampton town';