Question: In which city does this annual convention (first occurred in June 1993) that Iftach Ian Amit founded take place ?

full_context: Document 1: National Sports Collectors Convention: The National Sports Collectors Convention is the largest, annual trade show held in the United States devoted to sports memorabilia. Also known as The National, the convention has been held annually since 1980 when a small handful of sports card collectors convened at a hotel located adjacent to the Los Angeles International Airport. The show changes location each year to allow people from all areas of the country to participate. The show also changes the autograph signers each year.
Document 2: Israel's Secret Wars: It explores the role of secret intelligence and covert activities in the Zionist movement before independence and explore the operational and political histories all three major Israeli intelligence agencies Aman (military intelligence), Mossad (foreign intelligence and covert operations) and Shin Bet (internal security).
Document 3: Steven Stalinsky: Steven Stalinsky is an expert on the Middle East, terrorism and terrorist use of the Internet, and encryption technologies, and has served as Executive Director of the Middle East Media Research Institute (MEMRI) since 1999. Stalinsky has briefed staff of the White House, State Department, Homeland Security, Justice Department, Office of Director of National Intelligence, Defense Department, Capitol Hill and other institutions. Since 2006, his research has focused on detailing and developing strategies against cyber jihad, describing how terrorist groups such as Al-Qaeda, ISIS, and others use the Internet, social media, and encryption for propaganda, recruiting, and hacking. He was an early advocate of calling on the tech community to take stronger action on removing terrorist content from their platforms and for creating industry standards to combat it.
Document 4: Apple Worldwide Developers Conference: The Apple Worldwide Developers Conference (WWDC, also referred to as "dub-dub") is a conference held annually in California by Apple Inc. The event is used by Apple to showcase its new software and technologies for software developers. Attendees can participate in hands-on labs with Apple engineers, and in-depth sessions covering a wide variety of topics. WWDC began in 1983 in Monterey, California. Until 2007, the number of attendees varied between 2,000 and 4,200; however, during WWDC 2007, Steve Jobs noted that there were more than 5,000 attendees. The WWDC events held from 2008 to 2015 were capped, and sold out at 5,000 attendees (5,200 including special attendees).
Document 5: Greg Hoglund: Michael Gregory "Greg" Hoglund is a recognized author, researcher, and serial entrepreneur in the cyber security industry. He is the founder of several companies, including Cenzic and HBGary. Hoglund contributed a great deal of early research to the field of rootkits, software exploitation, buffer overflows, and online game hacking. His later work focused on computer forensics, physical memory forensics, malware detection, and attribution of hackers. He holds a patent on fault injection methods for software testing, and fuzzy hashing for computer forensics. Due to an email leak in 2011, Hoglund is well known to have worked for the U.S. Government and Intelligence Community in the development of rootkits and exploit material. It was also shown that he and his team at HBGary had performed a great deal of research on Chinese Government hackers commonly known as APT (Advanced persistent threat). For a time, his company HBGary was the target of a great deal of media coverage and controversy following the 2011 email leak (see below, Controversy and email leak). HBGary was later acquired by a large defense contractor.
Document 6: Digitalk: Digitalk is an annual two-days technology conference, organized by the Bulgarian business newspaper Capital weekly. Digitalk provides a place for discussion between creative professionals, investors, entrepreneurs, and marketing executives on the future of the web. Speakers cover topics such as mobile marketing, online advertising, commerce, brand storytelling, and entrepreneurship. The first conference was held at the Ivan Vazov National Theatre in Sofia, Bulgaria on September 26, 2011. Its topics addressed the influence of mobile technologies on business and society. Past speakers include Matt Mullenweg, Horace Dediu, Felix Salmon, James McKelvey, Sasha Bezuhanova, and others. The 2011 conference drew more than 700 people from all over Southeastern Europe.
Document 7: Yuval Ben-Itzhak: Yuval Ben-Itzhak is an executive and entrepreneur. He received a number of honors and public recognition for his work as a Chief Technology Officer throughout his career. Ben-Itzhak has been selected as the 25 most influencing CTO by Infoworld, 40 Innovative IT People To Watch by Computerworld, and 2017 Chief Technology Officer of the Year by GeekTime. He was the Chief Technology Officer at AVG and was part of the leadership team that took AVG through its initial public offering on the New York Stock Exchange in 2012. He was the Chief Technology Officer at Outbrain until 2017, and now is the Chief Executive Officer at Socialbakers.
Document 8: DEF CON: DEF CON (also written as DEFCON, Defcon, or DC) is one of the world's largest hacker conventions, held annually in Las Vegas, Nevada, with the first DEF CON taking place in June 1993. Many of the attendees at DEF CON include computer security professionals, journalists, lawyers, federal government employees, security researchers, students, and hackers with a general interest in software, computer architecture, phone phreaking, hardware modification, and anything else that can be "hacked." The event consists of several tracks of speakers about computer- and hacking-related subjects, as well as social events Wargames and contests in everything from creating the longest Wi-Fi connection (aircrack-ng) and hacking computer systems to who can most effectively cool a beer in the Nevada heat.
Document 9: Teknival: Teknivals (the word is a portmanteau of the words tekno and festival) are large free parties which take place worldwide. They take place most often in Europe and are often illegal under various national or regional laws. They vary in size from dozens to thousands of people, depending on factors such as accessibility, reputation, weather, and law enforcement. The parties often take place in venues far away from residential areas such as squatted warehouses, empty military bases, beaches, forests or fields. The teknival phenomenon is a grassroots movement which has grown out of the rave, UK traveller and Burning Man scenes and spawned an entire subculture. Summer is the usual season for teknivals.
Document 10: Iftach Ian Amit: Iftach Ian Amit (Hebrew: יפתח איאן עמית) is an Israeli Hacker/computer security researcher and practitioner. He is one of the co-founders of the Tel Aviv DEF CON Group DC9723, the Penetration Testing Execution Standard, and presented at hacker conventions such as DEF CON, Black Hat, BlueHat, RSA Conference. He has been named SC Magazine's top experts and featured at Narratively's cover piece on Attack of the Superhackers and is frequently quoted and interviewed
Document 11: Amnon Shashua: Amnon Shashua (Hebrew: אמנון שעשוע‎ ‎ ; born 26 May 1960) is a computer science professor at the Hebrew University in Jerusalem as well as co-founder and CTO of Mobileye (NYSE:MBLY)and co-founder of OrCam.
Document 12: Convention (meeting): A convention, in the sense of a meeting, is a gathering of individuals who meet at an arranged place and time in order to discuss or engage in some common interest. The most common conventions are based upon industry, profession, and fandom. Trade conventions typically focus on a particular industry or industry segment, and feature keynote speakers, vendor displays, and other information and activities of interest to the event organizers and attendees. Professional conventions focus on issues of concern to the profession and advancements in the profession. Such conventions are generally organized by societies or communities dedicated to promotion of the topic of interest. Fan conventions usually feature displays, shows, and sales based on pop culture and guest celebrities. Science fiction conventions traditionally partake of the nature of both professional conventions and fan conventions, with the balance varying from one to another. Conventions also exist for various hobbies, such as gaming or model railroads.
Document 13: Fetish Con: Fetish Con is an annual trade show focusing on networking within the adult entertainment industry, classes and lectures for the general public, and retail sales of adult clothing and toys. The event was first held in 2001 and is produced by XIX Events. Known as "The Networking Event of the Year" by members of the adult fetish industry, Fetish Con trade shows are yearly events (formerly billed as Bond Con in New York). First held in 2001, Fetish Con
Document 14: Evolution Championship Series: The Evolution Championship Series (EVO or Evo) is an annual esports event that focuses exclusively on fighting games. The tournament is a completely open tournament and uses the double elimination format. As with Super Battle Opera, contestants travel from all over the world to participate, most notably from Japan. The first Evolution was originally held as a "Super Street Fighter II Turbo" and "Street Fighter Alpha 2" tournament called the Battle by the Bay. It changed its name to Evo in 2002. Every successive tournament has seen an increase of attendees. It has been held at various venues across the Las Vegas Valley since 2005.
Document 15: Yuval Elovici: Yuval Elovici is a computer scientist. He is a professor in the Department of Software and Information Systems Engineering at Ben-Gurion University of the Negev (BGU), where he is the incumbent of the Davide and Irene Sala Chair in Homeland Security Research. He is the director of the Cyber Security Research Center at BGU and the founder and director of the Telekom Innovation Laboratories at Ben-Gurion University. In addition to his roles at BGU, he also serves as the lab director of Singapore University of Technology and Design’s (SUTD) ST Electronics-SUTD Cyber Security Laboratory, as well as the research director of iTrust. In 2014 he co-founded Morphisec, a start-up company, that develops cyber security mechanisms related to moving target defense.
ground_truth: Las Vegas, Nevada