What is the Kilometer of the Berendries asphalt course with an Average climb less than 7 and Length (m) longer than 645?
CREATE TABLE "course" (
  "number" real,
  "name" text,
  "kilometer" real,
  "pavement" text,
  "length_m" real,
  "average_climb_pct" real
);
SELECT AVG("kilometer") FROM "course" WHERE "pavement"='asphalt' AND "length_m">645 AND "name"='berendries' AND "average_climb_pct"<7;