Question: Who got the pole position if the supporting is USAC National Midget Series?
SQL: SELECT "Pole position" FROM "1-25459168-2" WHERE "Supporting" = 'USAC National Midget Series';

Question: Who won the fastest lap if Anders Krohn won the pole position?
SQL: SELECT "Fastest lap" FROM "1-25459168-2" WHERE "Pole position" = 'Anders Krohn';

Question: How many rounds did João Victor Horto achieved the fastest lap?
SQL: SELECT COUNT("Round") FROM "1-25459168-2" WHERE "Fastest lap" = 'João Victor Horto';

Question: What circuit was used on August 21?
SQL: SELECT "Circuit" FROM "1-25459168-2" WHERE "Date" = 'August 21';

Question: How many rounds did Alex Ardoin achieved a fastest lap?
SQL: SELECT COUNT("Round") FROM "1-25459168-2" WHERE "Fastest lap" = 'Alex Ardoin';