Question: What source has a race winner of Ben Adriaenssen / Ben van den Bogaart, and the gp winner of Ben Adriaenssen / Ben van den Bogaart, for the date of 1 April?
SQL: SELECT "Source" FROM "2-16729457-2" WHERE "Race winners" = 'Ben Adriaenssen / Ben van den Bogaart' AND "GP winner" = 'Ben Adriaenssen / Ben van den Bogaart' AND "Date" = '1 April';

Question: What is the GP winner for the Race winners Valentin Giraud / Nicolas Musset, and a place Genk?
SQL: SELECT "GP winner" FROM "2-16729457-2" WHERE "Race winners" = 'Valentin Giraud / Nicolas Musset' AND "Place" = 'Genk';

Question: What is the date for a source of Result and a place of Iffendic?
SQL: SELECT "Date" FROM "2-16729457-2" WHERE "Source" = 'Result' AND "Place" = 'Iffendic';

Question: What date has a place of Chernivtsi, and a race winners of Etienne Bax / Kaspars Stupelis? What
SQL: SELECT "Date" FROM "2-16729457-2" WHERE "Place" = 'Chernivtsi' AND "Race winners" = 'Etienne Bax / Kaspars Stupelis';

Question: What is the GP winner with a place of Genk, with race winners Ben Adriaenssen / Ben van den Bogaart?
SQL: SELECT "GP winner" FROM "2-16729457-2" WHERE "Place" = 'Genk' AND "Race winners" = 'Ben Adriaenssen / Ben van den Bogaart';

Question: What is the race winners for the date of 23 June?
SQL: SELECT "Race winners" FROM "2-16729457-2" WHERE "Date" = '23 June';