Question: What is the birthday of the rapper featured on the mixtape Crenshaw who goes by the name 9thmatic?

Context paragraphs:
The Marathon Continues: The Marathon Continues or TMC for short, is the sixth official mixtape by American rapper Nipsey Hussle.  The mixtape was released as a free digital download on mixtape hosting websites, and to iTunes on November 1, 2011, via Hussle's All Money In record label.  The mixtape featured production by 1500 or Nothin', THC, Wizzo, and Mistah Mota, among others.  Guest appearances on the mixtape included Dom Kennedy, YG, Cobby Supreme and Yung Brodee among others.

Kilt II: Kilt II is the fifth solo mixtape by American rapper Iamsu! .  The mixtape was released on June 6, 2013 independently for free.  Then on July 9, 2013, a deluxe edition of the mixtape was released to digital music retailers.  Production on the mixtape was primarily handled by Iamsu!  and other members of the group The Invasion, among others such as Trackademicks, and Tha Bizness.  The album featured guest appearances members of The Invasion, HBK Gang, among others such as Problem, Juvenile, Ty Dolla Sign, Terrace Martin, Tank, and Mistah FAB.  The mixtape was met with generally positive reviews from music critics.

Iggy Azalea videography: Australian rapper Iggy Azalea has been featured in twenty-one music videos (including thirteen as a lead artist and five as a featured artist), one film, among various appearances in other audiovisual productions.  In 2011, Azalea uploaded on YouTube her debut music video for "Pu$$y," a song from her debut mixtape, "Ignorant Art", where it subsequently went viral, helping to propel the rapper to prominence, after previously sharing home videos as an underground rapper.  She released two more videos from the project in following months, "My World" and "The Last Song."  In 2012, she aligned herself with Southern rapper T.I.'s Grand Hustle imprint.  He was then featured on "Murda Bizness," taken from her "Glory" EP, also appearing in the visuals, marking the beginning of multiple collaborations between the two.  Around this time, Azalea made her debut appearance on American television at the 2012 BET Hip Hop Awards alongside other Grand Hustle label-mates.  Azalea announced she would be releasing a second mixtape titled "TrapGold" by premiering a video for the track "Bac 2 Tha Future (My Time)."  She was a guest performer on VH1 Divas 2012.

9th Wonder: Patrick Denard Douthit (born January 15, 1975), better known as 9th Wonder, is a hip hop record producer, record executive, DJ, lecturer, and rapper from Midway, North Carolina, U.S.  He began his career as the main producer for the group Little Brother in Durham, North Carolina, and has also worked with Mary J. Blige, Jean Grae, Wale, Jay-Z, Murs, Drake, Buckshot, Chris Brown, Destiny's Child, J. Cole, Kendrick Lamar, Erykah Badu, Ludacris, Mac Miller, David Banner, Lecrae, Jill Scott, Big Boi, Rapsody, and Anderson . Paak.  As of 2010, 9th Wonder raps under the name of 9thmatic.  9th Wonder has a smooth and soulful production style that relies on samples from artists such as Al Green and Curtis Mayfield.

Mailbox Money (mixtape): Mailbox Money is the ninth official mixtape by American rapper Nipsey Hussle.  The mixtape was released as a free digital download on December 31, 2014, on mixtape hosting websites.  It was also released in a limited first edition of 100 copies for $1,000 each including other incentives via his All Money In record label, which followed-up Crenshaw, that was sold under the same schema but rather 1,000 copies for $100.  The mixtape features production by DJ Mustard, Rance, Hit-Boy, DJ Khalil, Ralo Stylez and Wizzo, among others.  Guest appearances on the mixtape came from Rick Ross, Dom Kennedy, K Camp, Trae Tha Truth, Buddy and many others.  The mixtape was supported by the singles "A Hunnit A Show" featuring Rick Ross, "Between Us" featuring K Camp, "Where Yo Money At", "Count Up That Loot", and "50 Niggaz".

Happy Birthday (mixtape): Happy Birthday is the fourth mixtape released by British rapper Tinie Tempah.  The mixtape was released for free download on December 16, 2011 on Disturbing London Records - featuring production from 3Mindz, S-X, Wizzy Wow and Stargate.  The mixtape title is "Happy Birthday" because the mixtape came into production around Tempah's 23rd birthday (November 7).  Tracks "Like It or Love It", "Lucky Cunt" and "Till I'm Gone (Remix)" were leaked prior to the mixtape release to create buzz, with "Like It or Love It" receiving minor radio airplay.  "Happy Birthday" features British rappers Chipmunk, Giggs, Wretch 32, G-Frsh, Tinchy Stryder and Krept and Konan, including a variety of American rappers; Soulja Boy, J. Cole and Big Sean, along with Wiz Khalifa, Pusha T and Jim Jones on the "Till I'm Gone" remix (originally released on August 29, 2011).  British vocalist J. Warner also makes a guest appearance.

Crenshaw (mixtape): Crenshaw is the eighth official mixtape by American rapper Nipsey Hussle.  The mixtape was released as a free digital download on October 8, 2013, on mixtape hosting websites.  It was also released in a limited first edition of 1,000 copies for $100 each including other incentives via his All Money In record label.  The mixtape features production by The Futuristiks, 1500 or Nothin', 9th Wonder, DJ Dahi, Mike Free, Ralo, Wizzo and Jiggy Hendrix, among others.  Guest appearances on the mixtape came from Rick Ross, Dom Kennedy, Slim Thug, James Fauntleroy II, Z-Ro, Skeme and Sade among others.  The mixtape was supported by the singles "Checc Me Out" featuring Dom Kennedy and Cobby Supreme, "U See Us", "The Weather" featuring Rick Ross, "If U Were Mine" featuring Fauntleroy, and "1 of 1".

Wu-Syndicate: Wu-Syndicate is a group from Virginia consisting of Joe Mafia, Napoleon, and Myalansky (who named himself after the gangster Meyer Lansky).  They were originally called Crime Syndicate but changed their name to Wu-Syndicate when they signed to Wu-Tang Records and became Wu-Tang Clan affiliates.  After debuting on the compilation "" in 1998, their self-titled debut album "Wu-Syndicate" was released in 1999 on both Wu-Tang Records and their own label Slot Time Records.  The album was, like most releases from Wu-Tang Clan affiliates during this time enjoyed moderately successful sales with the single "Where Wuz Heaven" going gold.  Soon after the release there was a dispute of an unknown origin between the group and Wu-Tang Records and the group briefly changed their name to The Syndicate until 2009 with eventual reconciliation and the release of their second official album "Grimlenz", produced mostly by Antagonist Dragonspit of Virginia Beach,VA.  Both Myalansky and Napoleon continue to work with Joe Mafia but have refused to work with each other since the release of their first album.  In an interview Napoleon stated that though they have always clashed, "Mya is still my dude though regardless".  The group has maintained ties with various members of the Wu-Tang Family.  Napoleon is currently working on a project with fellow Wu-Tang alumni Solomon Childs, Shaka Amazulu, and Dexter Wiggle called "Illuminati Network".  Joe Mafia released his debut solo album "This One" in 2002 and founded his own label called 58 West Diamond Street Records.  Napoleon released his first solo album, "Kingpin Wit Da Inkpen" in 2007 and a mixtape titled "Mark of the Beast" in 2011.  Myalansky released his first solo album, "Drastic Measures" in 2008 and a mixtape a few years later in 2011 "AMW.Com".  Myalansky has also been working with California rapper Mitchy Slick and has released two more volumes of his "AMW.Com" mixtape series.  In 2013 Myalansky and Joe Mafia featured on the song "Golden Age Rapper" by CHG Unfadable.

Rawwest Nigga Alive: Rawwest Nigga Alive (edited version titled Rawwest Alive) is a mixtape by American rapper Tyga.  It was released on January 16, 2016, by his independently-owned record label Last Kings Records.  The mixtape features guest appearances from Chris Brown, Nas, T.I. and Goapele.  Preceding the mixtape's release were three singles: "Dope'd Up", "Happy Birthday", and "Baller Alert" featuring Rick Ross and 2 Chainz.

Kid Sensation: Stephen Spence (born 1971), best known by his stage name Kid Sensation, is an American rapper.  Born and raised in Seattle, Washington, Spence made his debut as a guest rapper featured on Sir Mix-A-Lot's album Swass, where he appeared on the tracks "Rippin'" and "Square Dance Rap"

Supporting paragraphs: Crenshaw (mixtape) 9th Wonder
Answer: January 15, 1975