Table: tv_ratings_16
Columns: episode_no
airdate
total_viewers
share
bbc_one_weekly_ranking

Question: What date did the episode with a weekly ranking of 14 air?
SQL: SELECT "airdate" FROM tv_ratings_16 WHERE "bbc_one_weekly_ranking" = 14

Question: What is the total number of total viewers with a share of 18.8% and a weekly ranking under 16?
SQL: SELECT COUNT("total_viewers") FROM tv_ratings_16 WHERE "share" = '18.8%' AND "bbc_one_weekly_ranking" < 16