CREATE TABLE "u_s_nielsen_ratings" (
  "episode" text,
  "rating" real,
  "share" real,
  "rating_share_18_49" text,
  "viewers_millions" real,
  "weekly_rank" text
);

Question: What is the average rating for "a lost puppy dog"?
SQL: SELECT AVG("rating") FROM "u_s_nielsen_ratings" WHERE "episode"='\"a lost puppy dog\"';