What is the average grid when the laps are smaller than 14 and Reine Wisell is the driver?
CREATE TABLE "classification" (
  "driver" text,
  "constructor" text,
  "laps" real,
  "time_retired" text,
  "grid" real
);
SELECT AVG("grid") FROM "classification" WHERE "laps"<14 AND "driver"='reine wisell';