Question: Who won on 3 June?
SQL: SELECT "Winner" FROM "2-12514326-1" WHERE "Date" = '3 June';

Question: Which date has a Race Leader of Hermann Buse ( GER ), and a Stage of 5?
SQL: SELECT "Date" FROM "2-12514326-1" WHERE "Race Leader" = 'Hermann Buse ( GER )' AND "Stage" = '5';

Question: Which race Leader has a Stage of 7?
SQL: SELECT "Race Leader" FROM "2-12514326-1" WHERE "Stage" = '7';

Question: Which date has a Stage of 12?
SQL: SELECT "Date" FROM "2-12514326-1" WHERE "Stage" = '12';