What is the total number of Seasons, when the Engine is Cosworth, and when the Team is Kraco Racing?
CREATE TABLE "winners" (
  "season" real,
  "date" text,
  "location" text,
  "driver" text,
  "chassis" text,
  "engine" text,
  "team" text
);
SELECT COUNT("season") FROM "winners" WHERE "engine"='cosworth' AND "team"='kraco racing';