Table: episodes_31
Columns: no
col
title
directed_by
story_by
teleplay_by
original_air_date
u_s_viewers_millions

Question: Who wrote the story viewed by 0.53 million viewers?
SQL: SELECT "story_by" FROM episodes_31 WHERE "u_s_viewers_millions" = '0.53'

Question: How many viewers watched the episode with a story by david simon & mari kornhauser?
SQL: SELECT "u_s_viewers_millions" FROM episodes_31 WHERE "story_by" = 'David Simon & Mari Kornhauser'

Question: How many entries are there for u.s. viewers (millions) for the episode directed by rob bailey?
SQL: SELECT COUNT("u_s_viewers_millions") FROM episodes_31 WHERE "directed_by" = 'Rob Bailey'

Question: What is the date the episode directed by rob bailey aired?
SQL: SELECT "original_air_date" FROM episodes_31 WHERE "directed_by" = 'Rob Bailey'