Question: Who released a mixtape featuring Herbert Anthony Stevens IV in 2014?
Context: Leslie Clark Stevens IV (February 3, 1924 – April 24, 1998) was an American producer, writer, and director.  He created two television series for the ABC network. " The Outer Limits" (1963–1965) and "Stoney Burke" (1962–63) and "Search" (1972–73) for NBC.  Stevens was the director of the horror film "Incubus" (1966), which stars William Shatner, and was the second film to use the Esperanto language.  He wrote an early work of New Age philosophy, "" (1970). Rough Shoot, also known as Shoot First, is a 1953 British thriller film starring Joel McCrea and Evelyn Keyes, and featuring Herbert Lom, Marius Goring and Roland Culver.  It was directed by Robert Parrish and written by Eric Ambler, based on the 1951 novel "A Rough Shoot" by Geoffrey Household. John Bassat Stevens IV (born July 28, 1987) is an American classic pop singer and was the sixth-place finalist on the third season of the television series "American Idol". Anthony Stevens (born 27 March 1933) is a well known Jungian analyst and psychiatrist who has written extensively on psychotherapy and psychology. Herbert Anthony Stevens IV (born February 23, 1987), better known by his stage name Ab-Soul, is an American hip hop recording artist from Carson, California.  In 2007, he signed to indie record label Top Dawg Entertainment (TDE), where he eventually formed a hip hop supergroup Black Hippy, alongside his label-mates and fellow California-based rappers Jay Rock, Kendrick Lamar and Schoolboy Q.  He is perhaps best known for his introspective lyrics and his four independent albums under TDE, "Longterm Mentality", "Control System", "These Days...", and "Do What Thou Wilt. ", which were all released to positive reviews and commercial success. The discography of Propaganda (birth name Jason Emmanuel Petty), an American Christian hip hop and spoken word artist and poet from Los Angeles, California, consists of five studio albums, two EPs, twelve compilation appearances, eleven music videos, including one as a featured performer, and twenty-three guest appearances.  Discovered by the underground hip hop collective Tunnel Rats, Petty made his debut in 2002 on "Speak Life" by Sev Statik.  On April 8, 2003, he released his solo debut album, "Out of Knowhere", with UpRok Records, and recorded as part of the Tunnel Rats on "".  He then recorded with the Tunnel Rats for the collective's 2004 self-titled album.  In 2006 he released the "I Am Not Them EP" with Tunnel Rat Music and recorded "Live This" as part of the Tunnel Rats-affiliated group Footsoldiers.  Footsoldiers also collaborated with KRS-One on his album "Life", with Petty appearing on the song "I Ain't Leaving", and DJ Tony Touch released a mixtape featuring the group.  Petty released a second solo EP, "The Sketchbook: A Small Collection of Unreleased Material", independently in 2008, and his second album, "Listen Watch Focus", also came out in 2008 through End of Earth Records.  Petty's next three albums were all released through the Portland-based Humble Beast Records.  The first, entitled "Art Ambidextrous", was recorded in collaboration with Odd Thomas, and came out in 2011.  Petty's third solo album, "Excellent", came out in 2012, and charted at No. 7 on the "Billboard" Top Gospel chart.  Petty's fourth solo album, "Crimson Cord" came out on April 29, 2014, and charted at No. 5 on the Billboard Top Christian chart, No. 2 on the Top Gospel, and No. 8 on the Top Rap chart. Anthony Stevens (born 1971) is a former Australian rules footballer. Vagrant is the debut mixtape by Most Dope member Bill.  It was released as a free digital download on April 17, 2014.  It features Mac Miller and Ab-Soul, among others. Rank theory is an evolutionary theory of depression, developed by Anthony Stevens and John Price, and proposes that depression promotes the survival of genes.  Depression is an adaptive response to losing status (rank) and losing confidence in the ability to regain it.  The adaptive function of the depression is to change behaviour to promote survival for someone who has been defeated.  According to rank theory, depression was naturally selected to allow us to accept a subordinate role.  The function of this depressive adaptation is to prevent the loser from suffering further defeat in a conflict. Errol Anthony Stevens (born 9 May 1986) is a Jamaican footballer who plays as a forward for V.League 1 side Hai Phong.
Answer: Bill