Table schema:
CREATE TABLE table_name_93 (circuit VARCHAR, date VARCHAR, winning_team VARCHAR, winning_driver VARCHAR)

Question: Which Circuit has the Winning Team of carlin motorsport, and the Winning Driver of oliver turvey, and a Date of 24 march?
SQL: SELECT circuit FROM table_name_93 WHERE winning_team = "carlin motorsport" AND winning_driver = "oliver turvey" AND date = "24 march"