CREATE TABLE "250cc_classification" (
  "rider" text,
  "manufacturer" text,
  "laps" real,
  "time_retired" text,
  "grid" real
);

Question: Which rider had fewer than 10 laps for the Aprilia manufacturer, finishing in retirement?
SQL: SELECT "rider" FROM "250cc_classification" WHERE "laps"<10 AND "manufacturer"='aprilia' AND "time_retired"='retirement';

Question: What is the time for a grid greater than 20, fewer than 26 laps, and the Aprilia manufacturer?
SQL: SELECT "time_retired" FROM "250cc_classification" WHERE "grid">20 AND "laps"<26 AND "manufacturer"='aprilia';

Question: Which rider had more than 23 laps, a manufacturer of Aprilia, and a grid of 14
SQL: SELECT "rider" FROM "250cc_classification" WHERE "laps">23 AND "manufacturer"='aprilia' AND "grid"=14;