What is the production number for Bell Hoppy in the MM Series?
CREATE TABLE "1954" (
  "title" text,
  "series" text,
  "director" text,
  "production_number" real,
  "release_date" text,
  "reissue" text
);
SELECT COUNT("production_number") FROM "1954" WHERE "series"='mm' AND "title"='bell hoppy';