Table: player_transfers_2007_08
Columns: exit_date
pos
player
to_club
transfer_fee

Question: What is the exit date of the player who transferred to Cardiff City?
SQL: SELECT "exit_date" FROM player_transfers_2007_08 WHERE "to_club" = 'cardiff city'

Question: What is the exit date of the player who transferred to Portsmouth?
SQL: SELECT "exit_date" FROM player_transfers_2007_08 WHERE "to_club" = 'portsmouth'

Question: Which player has a position of FW?
SQL: SELECT "player" FROM player_transfers_2007_08 WHERE "pos" = 'fw'