What is the average down (up to kbit/s) when the provider is willy.tel and the up (kbit/s) is more than 1984?
CREATE TABLE "germany" (
  "dsl_type" text,
  "provider" text,
  "resale" text,
  "down_up_to_kbit_s" real,
  "up_up_to_kbit_s" real
);
SELECT AVG("down_up_to_kbit_s") FROM "germany" WHERE "provider"='willy.tel' AND "up_up_to_kbit_s">1984;