Table: episode_data_6
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code

Question: What is the original air date of the episode with production code is 319?
SQL: SELECT "original_air_date" FROM episode_data_6 WHERE "production_code" = 319

Question: What is the title of episode 10?
SQL: SELECT "title" FROM episode_data_6 WHERE "no_in_season" = 10

Question: Who were the writers of the episode titled "Tricky Dick"?
SQL: SELECT "written_by" FROM episode_data_6 WHERE "title" = '"Tricky Dick"'