Question: At which convention in Atlanta does A. J. Hartley regularly present?

Context articles: Dragon Con
Labor Management Relations Act of 1947
A. J. Hartley
Femen France
Deborah Mackenzie
Barrie Dunsmore
The World Tonight
Georgia World Congress Center
National Quartet Convention
Bob Hartley

Dragon Con (previously Dragon*Con and sometimes DragonCon) is a North America multigenre convention, founded in 1987, which takes place annually over the Labor Day weekend in Atlanta, Georgia.
 s of 2017 , the convention draws attendance of over 80,000, features hundreds of guests, encompasses five hotels in the Peachtree Center neighborhood of downtown Atlanta near Centennial Olympic Park, and runs thousands of hours of programming for fans of science fiction, fantasy, comic books, and other elements of fan culture.
 It is operated by a private for-profit corporation, with the help of a 1,500-member volunteer staff.
 Dragon Con has hosted the 1990 Origins Game Fair and the 1995 North American Science Fiction Convention (NASFiC).
The Labor Management Relations Act of 1947 better known as the Taft–Hartley Act, (80 H.R. 3020, Pub.L.
 80–101 , 61 Stat.
 136 , enacted  23, 1947 ) is a United States federal law that restricts the activities and power of labor unions.
 The act, still effective, was sponsored by Senator Robert A. Taft and Representative Fred A. Hartley, Jr., and became law by overcoming U.S. President Harry S. Truman's veto on June 23, 1947; labor leaders called it the "slave-labor bill" while President Truman argued that it was a "dangerous intrusion on free speech," and that it would "conflict with important principles of our democratic society."
 Nevertheless, Truman would subsequently use it twelve times during his presidency.
 The Taft–Hartley Act amended the National Labor Relations Act (NLRA; informally the Wagner Act), which Congress passed in 1935.
 The principal author of the Taft–Hartley Act was J. Mack Swigert, of the Cincinnati law firm Taft, Stettinius & Hollister.
Andrew James Hartley is a British-born American novelist, who writes mystery/thrillers and fantasy adventures.
 His series of children's/young adult fantasy adventures came out in later 2011.
 He used to blog regularly for the writers' site Magical Words and is a regular presenter at Thrillerfest and Dragon Con.
 His thrillers have been USA Today and New York Times bestsellers and his 5th novel, "Will Power", was listed by Kirkus Reviews as one of the 15 best fantasy/scifi books of 2010.
 The first of three middle grades/young adult adventures, "Darwen Arkwright and the Peregrine Pact", was released from Razorbill (Penguin) in October 2011.
 In 2011 he co-authored with David Hewson a novelization of Shakespeare's "Macbeth" written specially for audio and released by Audible.com in June, narrated by Alan Cumming.
 His second collaboration with Hewson – an audio novel based on "Hamlet", performed by Richard Armitage – was named Audible.com's best book of 2014 and was nominated for two Audie awards.
FEMEN France is the French branch of FEMEN (Ukrainian: Фемен ), a feminist protest group founded in Ukraine in 2008 and famous for organizing topless protests.
 In October 2013 FEMEN had its largest membership in France.
 As of early January 2013, the organization consisted of 30 local activists.
 The only Ukrainians regularly present were Oksana Shachko and Inna Shevchenko.
Deborah Mackenzie (born 16 May 1955) is one of four presenters who regularly present the overnight shift on the rolling 24-hour UK news service the BBC News Channel, which is also shown on BBC One and BBC World News during this time.
Barrie Dunsmore is a journalist who covered foreign affairs for ABC News for 30 years.
 From 1965 to 1995, Dunsmore reported from Washington and more than one hundred countries on virtually every major international event: from wars, to summits, to the policies of seven U.S. presidents from Johnson to Clinton.
 From the height of the Cold War until its end, Dunsmore was regularly present when American presidents and Soviet leaders met.
 He was with Israeli troops when they captured the Suez Canal from Egypt in 1967 and when General Ariel Sharon put the city of Suez under siege in 1973.
 He was on Henry Kissinger's Middle East Shuttles in the aftermath of the 1973 war and was with President Jimmy Carter in the Middle East six years later when he finally cemented the historic Israeli-Egyptian peace treaty.
 Dunsmore covered the fall of South Vietnam in1975, conducted the first American television interview with Egyptian President Anwar Sadat and was with three former presidents (Nixon, Ford and Carter) who attended Sadat's funeral.
 He watched SCUD missiles fall on Saudi Arabia during the 1991 Gulf War.
 He had a worldwide scoop on the Soviet invasion of Afghanistan in 1979 and he did the first American television report on the destruction of the Amazon Rainforest in 1987.
The World Tonight is a British current affairs radio programme broadcast on BBC Radio 4, every weekday evening, which started out as an extension of the 10pm news.
 It features news, analysis and comment on domestic and world issues.
 Ritula Shah is currently the main presenter, usually presenting the first three days of the week.
 The programme utilises other BBC broadcasters including David Eades, Carolyn Quinn, James Coomarasamy, Roger Hearing, Samira Ahmed and Felicity Evans to regularly present on Thursdays, Fridays and in Shah's absence.
 Between 1989 and 2012, the main presenter was Robin Lustig.
The Georgia World Congress Center (GWCC) is a convention center in Atlanta, Georgia, USA.
 Enclosing some 3.9 million ft (360,000 m) in exhibition space and hosting more than a million visitors each year, the GWCC is the third-largest convention center in the United States.
 Opened in 1976, the GWCC was the first state-owned convention center established in the United States.
 The center is operated on behalf of the state by the Georgia World Congress Center Authority, which was chartered in 1971 by Georgia General Assembly to develop an international trade and exhibition center in Atlanta.
 The authority later developed the Georgia Dome, Centennial Olympic Park, and Mercedes-Benz Stadium, which replaced the Georgia Dome.
 The Georgia Dome was closed on March 5, 2017 and is scheduled for implosion on November 20, 2017 while Mercedes-Benz Stadium officially opened on August 26, 2017.
 While the GWCCA owns Mercedes-Benz Stadium, AMB Group, the parent organization for the National Football League's Atlanta Falcons and Major League Soccer's Atlanta United FC, is responsible for the stadium's operations.
The first National Quartet Convention was held in 1957.
 J. D. Sumner, Cecil Blackwood and James Blackwood of The Blackwood Brothers were the founders of the famous National Quartet Convention formerly held in Memphis, Tennessee.
 The National Quartet Convention featured all the major gospel groups at a three-day event at the Ellis Auditorium in Memphis, Tennessee.
 After the first couple of years, the NQC was moved to Birmingham, Alabama in 1959 and Atlanta, Georgia in 1960.
 It returned to Memphis in 1961 and was drawing annual crowds of 20,000 by the mid-1960s.
 Sumner bought the convention in 1971 and moved it to Nashville, Tennessee in 1972, where it remained until 1993.
 The National Quartet Convention was held in Nashville, Tn.
 through 1993.
 After 1993, it was moved to a new home, Louisville, Kentucky.
 In 2014 the convention moved to Pigeon Forge, Tennessee.
Bob Hartley (born September 7, 1960) is a hockey coach who was most recently the head coach for the Calgary Flames in the National Hockey League.
 He coached the Colorado Avalanche from 1998–2002, a period during which he won the Stanley Cup (2000–2001).
 He also coached the Atlanta Thrashers from the 2003–04 NHL season up until the beginning of the 2007–08 NHL season, when he was fired after the Thrashers got off to an 0–6 start.
 Hartley was enjoying a successful media career as a hockey analyst for the French-language RDS television channel, but in summer 2011 signed for the ZSC Lions, where he was the head coach in Zurich, Switzerland.