CREATE TABLE table_6859 ("Couple" CLOB, "Style" CLOB, "Music" CLOB, "Choreographer ( s ) " CLOB, "Chosen by" CLOB)

What is Choreographer(s), when Chosen By is Mary Murphy, and when Couple is Katee Shean Stephen 'Twitch' Boss?
SELECT "Choreographer(s)" FROM table_6859 WHERE "Chosen by" = 'mary murphy' AND "Couple" = 'katee shean stephen "twitch" boss'
SELECT "Choreographer(s)" FROM "table_6859" WHERE "Chosen by" = 'mary murphy' AND "Couple" = 'katee shean stephen "twitch" boss'