Question: Name a partner of Openbucks that is headquartered in Goodlettsville, Tennessee?
Context: Dollar General Corporation is an American chain of variety stores headquartered in Goodlettsville, Tennessee.  As of August 2017, Dollar General operated over 13,000 stores in all U.S. states except: Alaska, Hawaii, Idaho, Montana, Washington, and Wyoming. Openbucks is an Internet payment company based in the Silicon Valley, in the city of Mountain View, CA, which allows people to pay online using gift cards from major retailers.  Partners of Openbucks include Subway, CVS Pharmacy, Burger King, Sports Authority, Dollar General, Circle K, and Shell Oil Company. Troy Boswell (born May 23, 1966), known professionally as Leroy Troy, is an old-time banjo player from Goodlettsville, Tennessee.  His banjo style is the clawhammer or frailing style, distinct from more commonly found Scruggs style banjo playing in modern bluegrass.  He often performs humorous or comedy songs from the old-time music genre.  Troy often uses a washboard with various sound making devices affixed to it.  The "Bicycle Wreck" song is often played by Troy on the washboard.  Major musical influence attributed to Uncle Dave Macon and others taught by him.  Troy debuted on the Grand Ole Opry in 1988 and was the National Old-Time Banjo Champion in 1996. The Cartwright-Moss House is a historic house in Goodlettsville, Tennessee, USA. The 2012 Little League World Series started in South Williamsport, Pennsylvania on August 16 and ended on August 26.  Eight teams from the United States and eight from throughout the world competed in the 66th edition of this tournament.  Tokyo Kitasuna Little League of Tokyo, Japan defeated Goodlettsville Baseball Little League of Goodlettsville, Tennessee 12–2 in the World Championship game.  For the country of Japan, it was the eighth LLWS championship overall, and the second in three years.  This was the last World Series to feature players born in the 1900s. The Abner T. Shaw House is a historic mansion in Goodlettsville, Tennessee, U.S. that was built in 1855.  It was designed in the Greek Revival architectural style.  During the American Civil War of 1861-1865, the house was not burnt down by the Union Army because both Shaw and the Union general were Masons.  It has been listed on the National Register of Historic Places since March 28, 1985. WQQK (92-Q) is an Urban Adult Contemporary FM radio station broadcasting in the Nashville, Tennessee market on a frequency of 92.1 MHz.  Its transmitter site is in Goodlettsville, Tennessee (its city of license), and its studios are located in Nashville's Music Row district. David R. "Fergie" Ferguson (born July 2, 1962 in Nashville, Davidson County, Tennessee) began in the mid-1980s engineering Country Music recordings for "Cowboy" Jack Clement, at Clement's "Cowboy Arms Hotel and Recording Spa", in Nashville, Tennessee.  Today, Ferguson is best known for his works with Johnny Cash, as sound engineer on the highly successful Grammy Award winning American Recordings albums produced by Rick Rubin, in the 1990s and 2000s (decade).  Ferguson has also engineered or produced recordings for such artists as folk music legend John Prine, bluegrass music artist Mac Wiseman, The Del McCoury Band, country music legends Charley Pride, Eddy Arnold, rock-n-roll band U2, and many others.  Ferguson appeared as himself in the U2 film, "Rattle and Hum", and portrayed his mentor and once real-life boss, Jack Clement in the Jerry Lee Lewis film, Great Balls of Fire! .  Ferguson maintains a recording studio in Nashville, and resides in nearby Goodlettsville, Tennessee, near his boyhood home. Ashthon Jones (born February 27, 1986) is an American singer from Goodlettsville, Tennessee.  Jones finished as the 13th place finalist on the tenth season of "American Idol". Goodlettsville is a city in Davidson and Sumner counties, Tennessee.  Goodlettsville was incorporated as a city in 1958 with a population of just over 3,000 residents; at the 2010 census, the city had a total population of 15,921 and in 2015 the population was 16,994.  Goodlettsville chose to remain autonomous in 1963 when the city of Nashville merged with the government of Davidson County.
Answer: Dollar General