What is the average Entre Ríos Municipality with less than 9 Pojo Municipalities?
CREATE TABLE "languages" (
  "language" text,
  "totora_municipality" real,
  "pojo_municipality" real,
  "pocona_municipality" real,
  "chimor_municipality" real,
  "puerto_villarroel_municipality" real,
  "entre_r_os_municipality" real
);
SELECT AVG("entre_r_os_municipality") FROM "languages" WHERE "pojo_municipality"<9;