Table: simpsons_treehouse_episodes
Columns: episode
season
production_code
original_air_date
directed_by

Question: Which episode was directed by Bob Anderson with a production code of KABF16 and a season before than 25?
SQL: SELECT "episode" FROM simpsons_treehouse_episodes WHERE "season" < 25 AND "directed_by" = 'bob anderson' AND "production_code" = 'kabf16'

Question: Who was the director of the episode with a season after 8 and an episode of XVI?
SQL: SELECT "directed_by" FROM simpsons_treehouse_episodes WHERE "season" > 8 AND "episode" = 'xvi'