CREATE TABLE table_6860 ("Couple" TEXT, "Style" TEXT, "Music" TEXT, "Choreographer ( s ) " TEXT, "Chosen by" TEXT)

What is Choreographer(s), when Chosen is Mary Murphy, and when Style is Contemporary?
SELECT "Choreographer(s)" FROM table_6860 WHERE "Chosen by" = 'mary murphy' AND "Style" = 'contemporary'
SELECT "Choreographer(s)" FROM "table_6860" WHERE "Chosen by" = 'mary murphy' AND "Style" = 'contemporary'