What is the average position of pilot petr krejcirik, who has less than 11 points?
CREATE TABLE "overall_results" (
  "position" real,
  "pilot" text,
  "country" text,
  "glider" text,
  "points" real
);
SELECT AVG("position") FROM "overall_results" WHERE "points"<11 AND "pilot"='petr krejcirik';