What is the lowest laps driver Christian Vietoris with a grid smaller than 6 has?
CREATE TABLE "sprint_race" (
  "team" text,
  "driver" text,
  "laps" real,
  "time" text,
  "grid" real
);
SELECT MIN("laps") FROM "sprint_race" WHERE "driver"='christian vietoris' AND "grid"<6;