What is the Class for a year later than 1958, with 4 points?
CREATE TABLE "motorcycle_grand_prix_results" (
  "year" real,
  "class" text,
  "team" text,
  "points" real,
  "rank" text,
  "wins" real
);
SELECT "class" FROM "motorcycle_grand_prix_results" WHERE "year">1958 AND "points"=4;