Which team has a class of 500cc and rank of 16th?
CREATE TABLE "grand_prix_motorcycle_racing_results" (
  "year" real,
  "class" text,
  "team" text,
  "points" real,
  "rank" text,
  "wins" real
);
SELECT "team" FROM "grand_prix_motorcycle_racing_results" WHERE "class"='500cc' AND "rank"='16th';