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

Question: What was the tie for the Crystal Palace team?
SQL: SELECT "tie_no" FROM "fourth_round_proper" WHERE "home_team"='crystal palace';

Question: What is the attendance for No. 15 tie?
SQL: SELECT "attendance" FROM "fourth_round_proper" WHERE "tie_no"='15';