Table: episode_data_52
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code

Question: How many different season numbers does the episode "The Nineteenth Hole" have?
SQL: SELECT COUNT("no_in_season") FROM episode_data_52 WHERE "title" = '"The Nineteenth Hole"'

Question: How many different pairs of writers wrote the episode with series number 56?
SQL: SELECT COUNT("written_by") FROM episode_data_52 WHERE "no_in_series" = 56