Luis Salom had the fastest lap on which circuits? 
CREATE TABLE table_18303274_1 (circuit VARCHAR, fastest_lap VARCHAR)
SELECT circuit FROM table_18303274_1 WHERE fastest_lap = "Luis Salom"
### Context: CREATE TABLE table_18303274_1 (circuit VARCHAR, fastest_lap VARCHAR) ### Question: Luis Salom had the fastest lap on which circuits?  ### Answer: SELECT circuit FROM table_18303274_1 WHERE fastest_lap = "Luis Salom"