What Chicago collective had a member release a free mixtape?
Free (Based Freestyles Mixtape): Free (Based Freestyles Mixtape) is a collaborative mixtape by American rappers Lil B and Chance the Rapper. Free (Based Freestyles Mixtape):  It was released for free on August 5, 2015. Chance the Rapper: Chancellor Johnathan Bennett (born April 16, 1993), known professionally as Chance the Rapper, is an American rapper, singer, songwriter, record producer, and actor from the West Chatham neighborhood of Chicago, Illinois.
i don't know