What was the timeslot for the episode with less than 6.76 viewers and an 18-49 of 1.9/5?
CREATE TABLE "season_2_2009_2010_weekly_ratings" (
  "episode" text,
  "air_date" text,
  "timeslot" text,
  "18_49" text,
  "viewers" real
);
SELECT "timeslot" FROM "season_2_2009_2010_weekly_ratings" WHERE "viewers"<6.76 AND "18_49"='1.9/5';