CREATE TABLE table_10603 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine" TEXT, "Tyre" TEXT, "Driver" TEXT, "Rounds" TEXT)

Who used the Ford Cosworth DFV 3.0 v8 engine in rounds 3-12, with a G tire?
SELECT "Driver" FROM table_10603 WHERE "Engine" = 'ford cosworth dfv 3.0 v8' AND "Rounds" = '3-12' AND "Tyre" = 'g'
SELECT "Driver" FROM "table_10603" WHERE "Engine" = 'ford cosworth dfv 3.0 v8' AND "Rounds" = '3-12' AND "Tyre" = 'g'