Question: Which Manufacturer has a Laps of 21, a Grid larger than 16, and a Rider of Akira Ryō?
SQL: SELECT "Manufacturer" FROM "2-17051191-1" WHERE "Laps" = 21.0 AND "Grid" > 16.0 AND "Rider" = 'Akira Ryō';

Question: Which Time/Retired has a Rider of Daijiro Kato?
SQL: SELECT "Time/Retired" FROM "2-17051191-1" WHERE "Rider" = 'Daijiro Kato';

Question: Which Manufacturer has a Rider of Daijiro Kato?
SQL: SELECT "Manufacturer" FROM "2-17051191-1" WHERE "Rider" = 'Daijiro Kato';

Question: Which Time/Retired has a Manufacturer of Yamaha, and a Rider of Garry McCoy?
SQL: SELECT "Time/Retired" FROM "2-17051191-1" WHERE "Manufacturer" = 'Yamaha' AND "Rider" = 'Garry McCoy';