What is the team of driver klaus ludwig, who is class c1 and has more than 77 laps?
CREATE TABLE "official_results" (
  "class" text,
  "team" text,
  "driver" text,
  "chassis_engine" text,
  "laps" real
);
SELECT "team" FROM "official_results" WHERE "class"='c1' AND "laps">77 AND "driver"='klaus ludwig';