Question: The first Comdex was held in what city?

Context paragraphs:
COMDEX: COMDEX (an abbreviation of Computer Dealers' Exhibition) was a computer expo held at various locations in the Las Vegas Valley of Nevada, USA, each November from 1979 to 2003.  It was one of the largest computer trade shows in the world, usually second only to the German CeBIT, and by many accounts one of the largest trade shows in any industry sector, and COMDEX exhibitions have been held in many other countries from 1982 to 2005, altogether 185 shows.  The first COMDEX was held in 1979 at the MGM Grand (now Bally's), with 167 exhibitors and 3904 attendees.  In 1981, the first COMDEX/Spring was held in New York City.

Latin American Table Tennis Championships: The Latin American Table Tennis Championships is a table tennis tournament for Latin America.  It was first held in 1978 in Mexico City.  The second edition was held in 1980 in Rio de Janeiro.  After these two editions the Latin American Championships were suspended till 1989.  Between 1989 and 1992, the tournament was held every year.  Between 1994 and 2000, the tournament was held every two years (in the even years).  Since 2001 the tournament has been held annually.  Since its first edition the tournament has included seven competitions; namely, men's single, double and team; women's single, double and team; and mixed doubles.

Portland Marathon: The Portland Marathon is an annual marathon sporting event held in the city of Portland, Oregon.  The 2015 Portland Marathon was held Sunday, October 4, 2015.  The event begins at 7:00 a.m.  It was first held in 1972 and has been held every year since.  The marathon is generally held the first Sunday in October, with as many as 10,000 runners competing.  It features both full marathon and half marathon events, a Non-competitive Family Walk, and a Kid's Fun Run & Obstacle Course.  As of 2016, the marathon drew around 7,000 participants for the marathon and 3,000 for the half-marathon.

Federal prince: Federal prince (German: "Bundesfürsten" , "Princes of the Federation") was the generic term for the royal heads of state (monarchs) of the various states making up the German Empire, with the exception of the states that were republics and Alsace-Lorraine which had a special status.  The empire was a federal state, with its constituent states remaining sovereign states.  Among the states, the majority were monarchies, 3 states were republics and Alsace-Lorraine was an imperial territory ruled by a steward.  The states became part of the German Empire by an 1871 treaty.  The head of the empire was granted the title German Emperor (with the title "Emperor of Germany" being deliberately avoided), and was simultaneously a federal prince as King of Prussia, the sovereign of its largest federal state.  Of the princely heads of state, 4 held the title King (König) (the Kings of Prussia, Bavaria, Saxony, and Württemberg), 6 held the title Grand Duke (Großherzog), 5 held the title Duke (Herzog), and 7 held the title Prince (i.e. Sovereign Prince, "Fürst").  The heads of state of the city republics, where the concepts of nobility and royalty did not exist, were of equal standing to the federal princes and held the titles First Mayor and President of the Senate (Hamburg), Mayor and President of the Senate (Lübeck), and President of the Senate and Mayor (Bremen).  The heads of state of the city republics were regarded as primi inter pares among the senators according to the states' republican constitutions, and these states were ruled by an oligarchy of hereditary Grand Burghers, also known as Hanseaten or patricians.

Prairie du Chien City Hall: The Prairie du Chien City Hall is the city of Prairie du Chien, Wisconsin's historic former city hall.  The city hall was built in 1894 on the grounds of the city's former opera house, which burned down the previous year.  In addition to being the center of city government, the building served a variety of other purposes; it held a civic auditorium, Prairie du Chien's first public library, a jail, and the city's police and fire departments.  From 1929 to the 1950s, the American Legion held meetings and events in the building as well.  In 2002–03, the city government left the building for a new city hall.

World Costume Festival: The World Costume Festival is an international fashion festival held every two years in the Philippines city of Vigan City in Ilocos Sur.  The event showcases indigenous and modern costumes geared towards live performances, such as drama, festivals, events, as well as multimedia presentations.  It emphasizes apparel for special ritual occasions or theater performance work as opposed to regular fashion apparel.  Its organizers aim to promote tourism as well as encourage native loom-weaving and fabrics.  There is an emphasis on fabric materials and Philippine weaving methods such as batik, abel, and piña, from different parts of the Philippines.  A festival was held in Vigan City in the last week of April in 2013.  The dominant view is that the 2013 festival in Vigan was the first world costume festival, although there is a report of a similar costume festival that was held in Davao City in the southern Philippine island of Mindanao in 2001.  There are reports of the event either becoming an annual event or being held every two years.  The event coincides with fashion festivals held in different cities in the Philippines.  The event was described as a preview for the "World Stage Design Festival" in Cardiff, Wales.  The primary focus of the event is a costume competition.  The highest award at the festival is the "Golden Kneeling Carabao Trophy," the carabao is a Philippine water buffalo sometimes found in swamps.  In addition to the costume competition, the event has workshops, classes by designers, conferences, as well as lectures from international experts.  There is a costume parade down the cobblestone streets of Vigan.  The event has "jubilant colors" as well as a body-painting competition.  The "Manila Standard" described the event as "kaleidoscopic" with people wearing costumes from the historic past.

West Coast Computer Faire: The West Coast Computer Faire was an annual computer industry conference and exposition most often associated with San Francisco, its first and most frequent venue.  The first fair was held in 1977 and was organized by Jim Warren and Bob Reiling.  At the time, it was the biggest computer show in the world, intended to popularize the personal computer in the home.  The West Coast PC Faire was formed to provide a more specialized show.  However, Apple stopped exhibiting at the West Coast Computer Faire, refusing to exhibit at any show other than COMDEX that also had PC-based exhibits.

Toronto Marathon: The Toronto Marathon, held annually in May, is a race from Mel Lastman Square, in the north end of Toronto, to Ontario Place.  The race was initially called the Canadian International Marathon, and was first held in 1995 under its current organizer.  The origins of the event trace back to 1977.  In 2003, its name was changed to the Toronto Marathon.  In 2008, it was again renamed for a new primary sponsor, GoodLife Fitness.  It was held previously on the third Sunday in October, the first Sunday after Canadian Thanksgiving, for 16 consecutive years.  Because of concerns that the Toronto Waterfront Marathon was being held three weeks prior lead to too many road closures, the Toronto Marathon is now run in May, beginning in 2011.  The event was temporarily held mid-May in 2011, due to other events in the City of Toronto that year.  The event is now held on the first Sunday in May, beginning in 2012.

1956 Summer Olympics: The 1956 Summer Olympics, officially known as the Games of the XVI Olympiad, were an international multi-sport event which was held in Melbourne, Victoria, Australia, in 1956, apart from the equestrian events, which were held five months earlier in Stockholm.  The 1956 Games were the first to be staged in the Southern Hemisphere and Oceania, as well as the first to be held outside Europe and North America.  Melbourne is the southernmost city to host the games.  Equestrian events could not be held in Australia due to quarantine regulations.  This was the second Olympics not to be held entirely in one country, the first being the 1920 Summer Olympics, which Antwerp, Belgium, co-hosted with Amsterdam and Ostend.

Bally's Las Vegas: Bally's Las Vegas (formerly MGM Grand Hotel and Casino) is a hotel and casino on the Las Vegas Strip in Paradise, Nevada.  It is owned and operated by Caesars Entertainment Corporation.  The hotel features 2,814 extra-sized guestrooms that are 450 sqft or larger and over 175000 sqft of banquet and meeting space.  The casino occupies 66187 sqft .  About 75% of the rooms are in the Indigo Tower, and were renovated in 2004.  The remaining rooms are located in the Jubilee Tower, constructed in 1981.

Supporting paragraphs: COMDEX Bally's Las Vegas
Answer: Paradise, Nevada.