Question: Both Chris Stapleton and Darius Rucker specialize in what genre of music?
Context: Learn to Live is the second studio album and country debut by American country artist, Darius Rucker.  The album was released September 16, 2008 on Capitol Nashville Records and was produced by Frank Rogers.  "Learn to Live" was Rucker's first studio album marketed towards country music, and is also his first release since 2002 R&B release "Back to Then."  The album spawned three number one singles on the "Billboard" country music chart: "Don't Think I Don't Think About It," "It Won't Be Like This for Long," and "Alright."  "Learn to Live" is Rucker's best-selling solo album to date, and is his only solo album to go platinum. "History in the Making" is a song co-written and recorded by American country music artist Darius Rucker.  Written along with Clay Mills and Frank Rogers, it was released in September 2009 as the fourth single from Rucker's album "Learn to Live". "I Got Nothin'" is a song recorded by American country music artist Darius Rucker and co-written by Rucker with Clay Mills.  It was released in May 2011 as the seventh solo single of Rucker's career, and the third single from his album "Charleston, SC 1966". Jon Nite (born in Amarillo, Texas) is a CMA and ACM award winning singer/songwriter who has written 14 top ten hits for American music's top artists.  Jon's songs have been recorded Tim McGraw, Chris Young, Dierks Bentley, Blake Shelton, Keith Urban, David Nail, Luke Bryan, Kenny Chesney, Phillip Phillips, Chase Rice, Jake Owen, Michael Ray, Adam Craig, Darius Rucker, Gloriana, and many more.  Teaming with EMI/SONY ATV, Jon has found a radio home with hits like “What Ever She’s Got” by David Nail, “Smoke” by A Thousand Horses, “We Were Us” by Keith Urban and Miranda Lambert, “Beachin” by Jake Owen, “Strip It Down”by Luke Bryan, “Break On Me” by Keith Urban, "Noise" by Kenny Chesney, “Think A Little Less” by Michael Ray, “If I Told You” by Darius Rucker and Boy (Lee Brice song), by Lee Brice. "It Won't Be Like This for Long" is a song co-written and recorded by American country music artist Darius Rucker, lead vocalist of the rock band Hootie & the Blowfish.  It was released in November 2008 as the second from his first country music album "Learn to Live".  Rucker co-wrote the song with Chris DuBois and Ashley Gorley. "Alright" is a song co-written and recorded by American singer Darius Rucker, lead vocalist of the rock band Hootie & the Blowfish.  It was released in April 2009 as the third single from his first country music album "Learn to Live".  Rucker co-wrote the song with producer Frank Rogers. Christopher Alvin Stapleton (born April 15, 1978) is an American singer-songwriter and guitarist.  He is an established songwriter with six country number-one songs including the five-week number-one "Never Wanted Nothing More" recorded by Kenny Chesney, "Love's Gonna Make It Alright" recorded by George Strait, and "Come Back Song" recorded by Darius Rucker.  Over 150 of Stapleton's songs have appeared on albums by such artists as Adele, Luke Bryan, Tim McGraw, Brad Paisley and Dierks Bentley.  Among other artists, he has co-written with Vince Gill, Peter Frampton and Sheryl Crow. Darius Carlos Rucker (born May 13, 1966) is an American singer and songwriter.  He first gained fame as the lead vocalist and rhythm guitarist of the Grammy Award-winning American rock band Hootie & the Blowfish, which he founded in 1986 at the University of South Carolina along with Mark Bryan, Jim "Soni" Sonefeld and Dean Felber.  The band has released five studio albums with him as a member, and charted six top 40 hits on the "Billboard" Hot 100.  Rucker co-wrote the majority of the band's songs with the other three members. "Don't Think I Don't Think About It" is a song recorded by American country music artist Darius Rucker.  The song, co-written by Rucker and Clay Mills, was released in May 2008 as Rucker's first single from his album "Learn to Live".  The song made Rucker the first individual African-American artist to chart a number one country hit since Charley Pride's "Night Games" reached the top of the charts in September 1983. "Come Back Song" is a song recorded by American country music artist Darius Rucker.  The song, co-written by Rucker and Nashville songwriters Casey Beathard and Chris Stapleton, was released to country music radio in July 2010 as the lead single from Rucker's second album of country music "Charleston, SC 1966".
Answer: country