Table: fa_cup_matches_8
Columns: tie_no
home_team
score
away_team
date

Question: What was the date when the away team was carlisle united?
SQL: SELECT "date" FROM fa_cup_matches_8 WHERE "away_team" = 'carlisle united'

Question: What was the date when the away team was the leeds united?
SQL: SELECT "date" FROM fa_cup_matches_8 WHERE "away_team" = 'leeds united'

Question: What was the tie number when peterborough united was the away team?
SQL: SELECT "tie_no" FROM fa_cup_matches_8 WHERE "away_team" = 'peterborough united'