Question: Marietta, Georgia, the county seat located in Cobb County, Georgia is home to what live hip-hop band that signed with Purple Ribbon Records in 2008?

Context paragraphs:
Cobb County School District: The Cobb County School District (CCSD) is the county government agency which operates public schools in Cobb County, Georgia, United States.  The school district includes all of Cobb County except for the Marietta City Schools.  It is the second-largest school system in Georgia (behind only Gwinnett County Public Schools) and among the largest in the United States, with a 2014 enrollment of 111,751.  It has 13,371 employees, 7,103 of whom are teachers.  The district is the county’s largest employer and one of the largest in the US (at least in school systems).  All Cobb County schools are accredited by the Southern Association of Colleges and Schools (SACS), and the district is among the first to have earned district-wide accreditation.

TV23 (Cobb County): CobbTV is a Government-access television channel (GATV) cable TV channel in Cobb County, Georgia, seen on Comcast TV channel 23, and in ATSC clear QAM on digital cable channel 81.23.  TV23 presents a variety of TV programming for the interest of Cobb County residents, including county commission and other local government meetings, educational and informational programming on various issues and services, and "Cobb Traffic Watch LIVE", which features views from Cobb DOT and Georgia DOT traffic cameras in Cobb during weekday rush hours. Overnight, it now carries the Pentagon Channel, after previously carrying old educational TV programs.

Purple Ribbon Records: Purple Ribbon Label is a record label owned by Outkast and distributed through Virgin Records.  The label was formerly known as Aquemini Records (named after OutKast's 1998 album) until André 3000 lost interest and pursued acting.  Big Boi has taken sole responsibility of the record label and its roster.  Slimm Cutta Calhoun was signed to Aquemini but he hasn't been heard of lately.  The current artists on the label are Konkrete and Janelle Monáe.  On July 30, 2008, Big Boi announced on DJ Envy's radio show that he recently signed the Marietta, Georgia live hip-hop/pop band Vonnegutt.  Big Boi later confirmed this signing on The Smoking Section and Allhiphop.com.

George Walton Comprehensive High School: George Walton Comprehensive High School, also known as Walton High School, is a public high school located in Marietta, Georgia, United States.  It is in eastern Cobb County and is a charter school in the Cobb County School District.  It is a School of Excellence and one of the top schools academically in the state.  It is one of the larger high schools in the East Cobb area.  As of the October 2, 2012 FTE count, there were 2,636 students attending Walton, making it the largest in the district by population.

Marietta, Georgia: Marietta is located in central Cobb County, Georgia, United States, and is the county's seat and largest city.

Marietta Daily Journal: The Marietta Daily Journal (MDJ) is a daily newspaper published in Marietta, Georgia.  It has a daily paid circulation of approximately 17,000 copies, and covers local, national and international news.  It is the primary local newspaper of Cobb County, Georgia (of which Marietta is the county seat, largest city, and geographic center), second only to the "Atlanta Journal-Constitution", which covers all of metro Atlanta, and previously most of north Georgia.

Ernest W. Barrett Parkway: Ernest W. Barrett Parkway (more commonly Barrett Parkway) is a major thoroughfare in the northwestern part of the Atlanta metropolitan area, in the north-central part of Cobb County, in the U.S. state of Georgia.  It travels from the southeastern edge of Kennesaw to a point north of Marietta, and continues on in both directions under other names.  The portion of Barrett Parkway between Interstate 575 (I-575/SR 5) and US 41/SR 3 (Cobb Parkway) is designated State Route 5 Connector.  The road is named after Ernest W. Barrett, the first chairman of the Cobb County Board of Commissioners in the 1960s, after home rule was enacted under a Georgia State Constitution amendment.  The initial portion was constructed through Barrett family land, enabling it to be later sold for major development.

Sprayberry High School: Sprayberry High School is a public high school located in eastern Cobb County in Marietta, Georgia, United States, a suburb of Atlanta.  It is a comprehensive senior high school (grades 9-12) with approximately 1700 students.  It opened in 1952 at a location on Cobb Parkway and moved to its current location at 2525 Sandy Plains Road in 1973.  Sprayberry High School is a microcosm of Cobb County in that it serves students from a variety of ethnic groups, socio-economic levels, and academic abilities.  Middle schools feeding upcoming students into Sprayberry are McCleskey, Daniell, and Simpson Middle School.  The school mascot is the Yellow Jacket.

Purple Ribbon All-Stars: Purple Ribbon All-Stars was a southern hip-hop supergroup under the Purple Ribbon Records (distributed through Virgin Records) label.  The group consisted of Big Boi, Killer Mike, Sleepy Brown, Konkrete, BlackOwned C-Bone, Rock D and Vonnegutt.

Marietta City Schools (Georgia): Marietta City Schools is the school district which operates the public schools in Marietta, Georgia, United States.  It is the only city in Cobb County which operates its schools separately from the Cobb County School District.

Supporting paragraphs: Purple Ribbon Records Marietta, Georgia
Answer: Vonnegutt