Table: episode_list_2
Columns: episode
title
directed_by
written_by
original_airdate

Question: What was the original air date when ed horowitz wrote it?
SQL: SELECT "original_airdate" FROM episode_list_2 WHERE "written_by" = 'ed horowitz'

Question: Name the episode number that aired on july 23, 2000
SQL: SELECT "episode" FROM episode_list_2 WHERE "original_airdate" = 'july 23, 2000'