What is the largest amount of wins when there are less than 5 points, the class is 500cc, the team is norton, and the year is more recent than 1955?
CREATE TABLE "motorcycle_grand_prix_results" (
  "year" real,
  "class" text,
  "team" text,
  "points" real,
  "wins" real
);
SELECT MAX("wins") FROM "motorcycle_grand_prix_results" WHERE "points"<5 AND "class"='500cc' AND "team"='norton' AND "year">1955;