Table: how_its_made_episodes
Columns: series_ep
episode
netflix
segment_a
segment_b
segment_c
segment_d

Question: Kitchen knives is segment a of what episode? 
SQL: SELECT "episode" FROM how_its_made_episodes WHERE "segment_a" = 'Kitchen Knives'

Question: When segment b is dining room tables what is segment d?
SQL: SELECT "segment_d" FROM how_its_made_episodes WHERE "segment_b" = 'Dining Room Tables'

Question: When marshmallow cookies is segment b what episode is it on netflix?
SQL: SELECT "netflix" FROM how_its_made_episodes WHERE "segment_b" = 'Marshmallow Cookies'

Question: When cardboard boxes is segment c what is segment a?
SQL: SELECT "segment_a" FROM how_its_made_episodes WHERE "segment_c" = 'Cardboard Boxes'