What is the league goals when the league cup goals is less than 0 and 16 (1) league apps?
CREATE TABLE "appearances_and_goals" (
  "squad_no" real,
  "name" text,
  "position" text,
  "league_apps" text,
  "league_goals" real,
  "fa_cup_apps" text,
  "fa_cup_goals" real,
  "league_cup_apps" text,
  "league_cup_goals" real,
  "total_apps" text,
  "total_goals" real
);
SELECT AVG("league_goals") FROM "appearances_and_goals" WHERE "league_apps"='16 (1)' AND "league_cup_goals"<0;