CREATE TABLE table_72612 ("Episode #" TEXT, "Country" TEXT, "City" TEXT, "Martial Art/Style" TEXT, "Masters" TEXT, "Original Airdate" TEXT)

Which martial arts style was shown in Rio de Janeiro?
SELECT "Martial Art/Style" FROM table_72612 WHERE "City" = 'Rio de Janeiro'
SELECT "Martial Art/Style" FROM "table_72612" WHERE "City" = 'Rio de Janeiro'