What is the largest Average with Goals smaller than 34, Matches larger than 30, and a Team of cultural leonesa?
CREATE TABLE "top_goalkeepers" (
  "goalkeeper" text,
  "goals" real,
  "matches" real,
  "average" real,
  "team" text
);
SELECT MAX("average") FROM "top_goalkeepers" WHERE "goals"<34 AND "matches">30 AND "team"='cultural leonesa';