Table: superstars_2008
Columns: round
circuit
series
pole_position
fastest_lap
winning_driver
winning_team

Question: How many times is the series italian and the circuit is valencia?
SQL: SELECT COUNT("round") FROM superstars_2008 WHERE "series" = 'Italian' AND "circuit" = 'Valencia'

Question: Who had the fastest lap for the circuit magione?
SQL: SELECT "fastest_lap" FROM superstars_2008 WHERE "circuit" = 'Magione'

Question: Who had the fastest lap when the winning driver is giorgio sanna?
SQL: SELECT "fastest_lap" FROM superstars_2008 WHERE "winning_driver" = 'Giorgio Sanna'

Question: Who had the fastest lap when the winning driver was kristian ghedina?
SQL: SELECT "fastest_lap" FROM superstars_2008 WHERE "winning_driver" = 'Kristian Ghedina'