What is listed for the Class that's got a Team of Cagiva and Points of 4?
CREATE TABLE "motorcycle_grand_prix_results" (
  "year" real,
  "class" text,
  "team" text,
  "points" real,
  "wins" real
);
SELECT "class" FROM "motorcycle_grand_prix_results" WHERE "team"='cagiva' AND "points"=4;