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

Question: What is the lowest grid for Roberto Rolfo with more than 26 laps?
SQL: SELECT MIN("grid") FROM "250cc_classification" WHERE "rider"='roberto rolfo' AND "laps">26;

Question: What was the time for Aprilia and their driver Casey Stoner, before gird 9, and less than 26 laps?
SQL: SELECT "time_retired" FROM "250cc_classification" WHERE "manufacturer"='aprilia' AND "grid"<9 AND "laps"<26 AND "rider"='casey stoner';

Question: What are the highest laps for Marco Melandri?
SQL: SELECT MAX("laps") FROM "250cc_classification" WHERE "rider"='marco melandri';