CREATE TABLE "grand_prix_motorcycle_racing_results" (
  "year" real,
  "class" text,
  "team" text,
  "points" real,
  "rank" text,
  "wins" real
);

Question: What are the most wins in 1971 in 250cc class?
SQL: SELECT MAX("wins") FROM "grand_prix_motorcycle_racing_results" WHERE "class"='250cc' AND "year"=1971;

Question: What is the earliest year with less than 45 points for Yamaha team in 21st rank?
SQL: SELECT MIN("year") FROM "grand_prix_motorcycle_racing_results" WHERE "points"<45 AND "team"='yamaha' AND "rank"='21st';