Question: Which driver won at the Sachsenring circuit?
SQL: SELECT "Winning driver" FROM "1-1140114-5" WHERE "Circuit" = 'Sachsenring';

Question: Which constructor was present at the RedeX Trophy race?
SQL: SELECT "Constructor" FROM "1-1140114-5" WHERE "Race Name" = 'RedeX Trophy';

Question: How many different constructors had Paul Thiel as a winning driver?
SQL: SELECT COUNT("Constructor") FROM "1-1140114-5" WHERE "Winning driver" = 'Paul Thiel';