Which Comprehension of Danish has an Average smaller than 6.85, and a Comprehension of Norwegian of 4.13?
CREATE TABLE "mutual_intelligibility" (
  "city" text,
  "comprehension_of_danish" text,
  "comprehension_of_swedish" text,
  "comprehension_of_norwegian" text,
  "average" real
);
SELECT "comprehension_of_danish" FROM "mutual_intelligibility" WHERE "average"<6.85 AND "comprehension_of_norwegian"='4.13';