Question: Who is the Las Vegas businessman and reality television personality, currently retired, that co-owns a pawn shop Chumlee currently works at?

Context paragraphs:
Game of Pawns (television series): Game of Pawns is a television game show based in Branson, Missouri about the goings on in a local pawn shop.  The show stars; Justin Tranchita , Scott Velvet and Brian Roman.  The plot of the show is a mix of a game show and reality television series as Scott and Brian buy unusual items at Branson Pawn using a trivia game to give patrons the chance to win more for their item all while Justin gets into trouble and goofs off making the days at Branson Pawn move along with a little more excitement.  Dealing in everything from celebrity cars to antique guns, they never know just what – or who – will walk through the door next.  At Branson Pawn, every day’s a gamble.  Scott and Brian give each customer three questions.  If they get two of the three right, the customer gets their price.  If not, the house wins and Brian and Scott get their price.  This show runs on the Discovery Channel globally as re-runs and had its debut in 2013 with eight original episodes.

Corey Harrison: Richard Corey "Big Hoss" Harrison (born April 27, 1983) is an American businessman and reality television personality, known as a cast member of the History TV series "Pawn Stars", which documents his work at the World Famous Gold & Silver Pawn Shop in Las Vegas, which he co-owns with his father, Rick Harrison, and grandfather, Richard Benjamin Harrison.

Richard Benjamin Harrison: Richard Benjamin Harrison Jr., (also known by the nicknames The Old Man and The Appraiser) (born March 4, 1941), is a Las Vegas businessman and reality television personality, best known as the co-owner of the World Famous Gold & Silver Pawn Shop, as featured on the History channel series "Pawn Stars".  Harrison was the co-owner of a pawn shop with his son Rick Harrison until he suffered a stroke, causing him to retire.They opened the store together in 1989.

Hardcore Pawn: Chicago: Hardcore Pawn: Chicago is an American reality television series on truTV.  A spin-off of "Hardcore Pawn", the series follows the day-to-day operations of the Royal Pawn Shop located in Chicago, Illinois, at 428 S. Clark Street across from the Metropolitan Correctional Center near Chicago's Financial District.

Pawn Stars UK: Pawn Stars UK is a British reality television series which debuted on 26 August 2013 on the British version of the History channel.  The series is filmed in Sealand, Flintshire in Wales, and chronicles the day-to-day activities of pawn shop Regal Pawn, collaboratively run by Mark Andrew Manning, Mark Lever Holland, Marco Peter Holland, Simon Penworth, and Vicki Manning.

Pawn Stars: Pawn Stars is an American reality television series, shown on History, and produced by Leftfield Pictures.  The series is filmed in Las Vegas, Nevada, where it chronicles the daily activities at the World Famous Gold & Silver Pawn Shop, a 24-hour family business opened in 1989 and operated by patriarch Richard "Old Man" Harrison, his son Rick Harrison, Rick's son Corey "Big Hoss" Harrison, and Corey's childhood friend, Austin "Chumlee" Russell.  The series, which became the network's highest rated show and the No. 2 reality show behind "Jersey Shore", debuted on July 26, 2009.

Pawnography: Pawnography is an American game show broadcast by History.  Hosted by comedian Christopher Titus and featuring "Pawn Stars" personalities Rick Harrison, Corey Harrison and Austin "Chumlee" Russell as panelists, the series features contestants answering questions for a chance to win cash and items for sale from the Gold and Silver Pawn Shop (where "Pawn Stars" is taped).  The show premiered July 10, 2014, at 10 p.m. ET, following "Pawn Stars".

Chumlee: Austin Lee Russell (born September 8, 1982), better known by his stage name of Chumlee, is an American actor, businessman and reality television personality, known as a cast member on the History Channel television show "Pawn Stars", which depicts the daily business at the Gold and Silver Pawn Shop in Las Vegas where Russell works as an employee.  Chumlee came to work at the pawn shop five years before filming of the first season, having been a childhood friend of Corey Harrison, whose father, Rick Harrison, and grandfather, Richard Benjamin Harrison, opened the shop in 1989.

List of Pawn Stars episodes: "Pawn Stars" is an American reality television series that premiered on History on July 19, 2009.  The series is filmed in Las Vegas, Nevada, where it chronicles the activities at the World Famous Gold & Silver Pawn Shop, a 24-hour family business operated by patriarch Richard "Old Man" Harrison, his son Rick Harrison, Rick's son Corey "Big Hoss" Harrison, and Corey's childhood friend, Austin "Chumlee" Russell.

Rick Harrison: Richard Kevin "Rick the Spotter" Harrison (born March 22, 1965) is an American, Las Vegas-based businessman and reality television personality, best known as the co-owner of the World Famous Gold & Silver Pawn Shop, as featured on the History series "Pawn Stars".  He co-owns the pawn shop with his father, Richard Benjamin Harrison, which they opened in 1989.  Harrison dropped out of high school to pursue his "$2,000-a-week business of selling fake Gucci bags".

Supporting paragraphs: Chumlee Richard Benjamin Harrison
Answer: Richard Benjamin Harrison