What is the largest # for an episode that was written by Allison Lea Bingeman?
CREATE TABLE "table1_10470082_7" (
  "no" real,
  "num" real,
  "title" text,
  "director" text,
  "writer" text,
  "us_air_date" text,
  "storyteller" text,
  "villains" text
);
SELECT MAX("num") FROM "table1_10470082_7" WHERE "writer"='Allison Lea Bingeman';