Table: tv_episodes_ranked
Columns: no
col
title
directed_by
written_by
u_s_viewers_million
rank_week
original_air_date

Question: When is the original air date written by sean whitesell?
SQL: SELECT "original_air_date" FROM tv_episodes_ranked WHERE "written_by" = 'Sean Whitesell'

Question: Who is no. 79 directed by?
SQL: SELECT "directed_by" FROM tv_episodes_ranked WHERE "no" = 79

Question: What is the # when u.s. viewers  (million) is 17.44?
SQL: SELECT COUNT("col") FROM tv_episodes_ranked WHERE "u_s_viewers_million" = '17.44'

Question: How many # were written by david hoselton?
SQL: SELECT MAX("col") FROM tv_episodes_ranked WHERE "written_by" = 'David Hoselton'