Table: tv_episode_data_137
Columns: series
season
title
written_by
original_air_date
u_s_viewers_millions

Question: what is the number of the episode in the season that had 7.19 millions of north american viewers? 
SQL: SELECT "season" FROM tv_episode_data_137 WHERE "u_s_viewers_millions" = '7.19'

Question: what is the name of the episode whose writers were jeff astrof & matt goldman? 
SQL: SELECT "title" FROM tv_episode_data_137 WHERE "written_by" = 'Jeff Astrof & Matt Goldman'

Question: who were the writers of the episode that had 5.56 millions of north american viewers? 
SQL: SELECT "written_by" FROM tv_episode_data_137 WHERE "u_s_viewers_millions" = '5.56'

Question: what is the name of the episode whose writers were jeff astrof & matt goldman? 
SQL: SELECT "title" FROM tv_episode_data_137 WHERE "written_by" = 'Jeff Astrof & Matt Goldman'