What Episode has a Rating of 1.8, and Viewers (m) smaller than 2.73?
CREATE TABLE "weekly_ratings" (
  "episode" text,
  "18_49" text,
  "viewers_m" real,
  "rating" text,
  "share" text
);
SELECT "episode" FROM "weekly_ratings" WHERE "rating"='1.8' AND "viewers_m"<2.73;