For years before 1996, having a rank of 3rd in the 125cc class, what is the sum of the points?
CREATE TABLE "grand_prix_career_statistics" (
  "year" real,
  "class" text,
  "team" text,
  "points" real,
  "rank" text,
  "wins" real
);
SELECT SUM("points") FROM "grand_prix_career_statistics" WHERE "class"='125cc' AND "rank"='3rd' AND "year"<1996;