CREATE TABLE "ratings" (
  "show" text,
  "date" text,
  "official_ratings_millions" real,
  "weekly_rank" text,
  "share" text
);

Question: When were the shares 39.1%?
SQL: SELECT "date" FROM "ratings" WHERE "share"='39.1%';

Question: Which show aired on 19 april?
SQL: SELECT "show" FROM "ratings" WHERE "date"='19 april';