Table: dance_episode
Columns: couple
style
music
choreographer_s
chosen_by

Question: What is Choreographer(s), when Chosen By is Mary Murphy, and when Couple is Katee Shean Stephen "Twitch" Boss?
SQL: SELECT "choreographer_s" FROM dance_episode WHERE "chosen_by" = 'mary murphy' AND "couple" = 'katee shean stephen "twitch" boss'

Question: What is Choreographer(s), when Chosen is Mary Murphy, and when Style is Contemporary?
SQL: SELECT "choreographer_s" FROM dance_episode WHERE "chosen_by" = 'mary murphy' AND "style" = 'contemporary'

Question: What is Chosen By, when Couple is Katee Shean Joshua Allen, and when Choreographer(s) is Nakul Dev Mahajan?
SQL: SELECT "chosen_by" FROM dance_episode WHERE "couple" = 'katee shean joshua allen' AND "choreographer_s" = 'nakul dev mahajan'

Question: What is Style, when Choreographer(s) is Dave Scott?
SQL: SELECT "style" FROM dance_episode WHERE "choreographer_s" = 'dave scott'

Question: What is Couple, when Choreographer(s) is Nakul Dev Mahajan?
SQL: SELECT "couple" FROM dance_episode WHERE "choreographer_s" = 'nakul dev mahajan'