Question: What date is listed at place 13
SQL: SELECT "Date" FROM "1-1140103-6" WHERE "#" = 13.0;

Question: What date has a Solitudering circuit
SQL: SELECT "Date" FROM "1-1140103-6" WHERE "Circuit" = 'Solitudering';

Question: How many dates have Silverstone circuit
SQL: SELECT COUNT("Date") FROM "1-1140103-6" WHERE "Circuit" = 'Silverstone';

Question: How many constructors are listed for the XVI BRDC International Trophy race
SQL: SELECT COUNT("Constructor") FROM "1-1140103-6" WHERE "Race Name" = 'XVI BRDC International Trophy';