Table: tv_episode_data_21
Columns: col
title
director
writer_s
original_air_date
production_code
u_s_viewers_millions

Question: What is the number of the episode seen by 1.370 million people in the US?
SQL: SELECT MAX("col") FROM tv_episode_data_21 WHERE "u_s_viewers_millions" = '1.370'

Question: What's the number of the episode directed by Whitney Ransick?
SQL: SELECT "col" FROM tv_episode_data_21 WHERE "director" = 'Whitney Ransick'

Question: Who directed the episode written by Jason Yoshimura?
SQL: SELECT "director" FROM tv_episode_data_21 WHERE "writer_s" = 'Jason Yoshimura'

Question: Who directed the episode titled "Risky Business"?
SQL: SELECT "director" FROM tv_episode_data_21 WHERE "title" = '"Risky Business"'