Table: ep_info
Columns: col
col_2
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_millions

Question: How many directors for #15?
SQL: SELECT COUNT("directed_by") FROM ep_info WHERE "col_2" = 15

Question: What is every director with production code of NABF13?
SQL: SELECT "directed_by" FROM ep_info WHERE "production_code" = 'NABF13'

Question: What are all values for U.S. viewers(millions) with Kevin Curran as a writer?
SQL: SELECT "u_s_viewers_millions" FROM ep_info WHERE "written_by" = 'Kevin Curran'

Question: How many titles for the production code of NABF07?
SQL: SELECT COUNT("title") FROM ep_info WHERE "production_code" = 'NABF07'