Question: On the first Friday in September, The Adelaide suburb of Wayville hosts the state's biggest event. What is the event?

Context paragraphs:
King of Pro-Wrestling (2015): King of Pro-Wrestling (2015) was a professional wrestling pay-per-view (PPV) promoted by New Japan Pro-Wrestling (NJPW).  The event took place on October 12, 2015, in Tokyo at Ryōgoku Kokugikan.  The event was NJPW's biggest event between August's G1 Climax and January's Wrestle Kingdom 10 in Tokyo Dome and was main evented by Kazuchika Okada defending the IWGP Heavyweight Championship against A.J. Styles.  All in all, the event featured nine matches, four of which were contested for championships.  In addition to airing worldwide through NJPW's internet streaming site, NJPW World, the event also aired in Japan as a regular PPV through SKY PerfecTV! .  This marked the first ever event on NJPW World to feature English commentary, provided by Kevin Kelly and Matt Striker.  It was the fourth event under the King of Pro-Wrestling name.

Gallery 5: Gallery5 is an arts center, museum, gallery, venue, and community space in Richmond, VA.  It is located at 200 West Marshall Street in Richmond, VA, in the historic Jackson Ward neighborhood.  Gallery5 is housed in the original building of Steamer Company Number 5, which is the oldest firehouse in Virginia, dating back to 1867.  This historic building has seen many incarnations; in addition to the original fire station the building has also served as a police station, a Fire and Police Museum, and a hot dog emporium.  The gallery is a cornerstone participant in Richmond's monthly First Friday Art Walk, which takes place on the first Friday of every month and draws artists and art-enthusiasts in throngs to Downtown Richmond.

City Market (Raleigh, North Carolina): City Market in Raleigh is a market located in Raleigh, North Carolina, United States.  It was founded in October, 1914.  It became known as a historic place when Raleigh City Council secured a grant from the North Carolina Division of Archives & History to study the architectural resources surrounding Moore Square, in 1980.  It is one of the major tourist attractions in Raleigh.  In early May, 2008, the market was the location of an art project unveiling by the Visual Art Exchange.  The market hosts a monthly festival, called "First Friday", on the first Friday of every month.

NJPW Power Struggle: Power Struggle is an annual professional wrestling event promoted by New Japan Pro-Wrestling (NJPW).  The event has been held since 2011 and aired domestically as a pay-per-view (PPV).  From 2012 to 2014, the event also aired outside Japan as an internet pay-per-view (iPPV).  Since 2015, the event has aired worldwide on NJPW's internet streaming site, NJPW World.  The event is held in November and is the final major event before the annual January 4 Dome Show, NJPW's biggest event of the year.

GEM Altigliss Challenge: GEM Altigliss Challenge is the biggest ski and snowboard student event in Europe.  The week-long event is organized annually in March by Altigliss, a student association of Grenoble École de Management.  It is classified by the newspaper Le Point Etudiants as the third biggest event organized by a student association in 2013.  GEM Altigliss Challenge is the biggest ski and snowboard student event in Europe.  The week-long event is organized annually in March by Altigliss, a student association of Grenoble École de Management.  The challenge unites an average of a 1000 university students combining more than 25 nationalities, from 30 Grandes écoles and other European universities.  The challenge is held at Val-d’Isère, ski resort in the Rhône-Alpes region of France.

NJPW Dominion: Dominion is an annual professional wrestling event promoted by New Japan Pro-Wrestling (NJPW).  The event has been held annually since 2009 as a pay-per-view (PPV).  From 2013 to 2014, the event also aired outside Japan as an Internet pay-per-view (iPPV).  Since 2015, the event has aired worldwide on NJPW's Internet streaming site, NJPW World.  Dominion is the first major event following the Best of the Super Juniors tournament and usually includes a match, where the tournament winner challenges for the IWGP Junior Heavyweight Championship, assuming the champion has not won the tournament.  In recent years, Dominion has developed into one of NJPW's showcase events and it is considered the biggest event since the January 4 Dome Show.  The first six Dominions took place in June, but in 2015, the event was moved to July, only to be moved back to June the following year.

Showground Central railway station: Showground Central railway station was a temporary station in the inner southern Adelaide suburb of Wayville, located 4.4 kilometres from Adelaide station.  The station was only used during the Royal Adelaide Show in early September each year.

Royal Adelaide Show: The Royal Adelaide Show (colloquially known simply as "The Show") is an annual agricultural show run by the Royal Agricultural and Horticultural Society of South Australia.  The Show always begins on the first Friday in September, and runs for 10 days (9 until 2013).  It is held at the Adelaide Showground, located in Wayville, a suburb of Adelaide, South Australia and is attended by up to half a million people every year, making it the State's biggest event.

Wayville, South Australia: Wayville is an inner-southern suburb of Adelaide in the City of Unley.  It is most notable for its hosting of the Royal Adelaide Show at the Adelaide Showgrounds.  The suburb is bordered to the north with the southern Parklands of Adelaide, and mostly to the south with the tramline.  The particular bordering locations of the South Park Lands are as follows: Kurrangga, Walyo Yerta, Minno Wirra, and Wikaparndo Wirra.  The southern border consists of a number of landmarks.  Starting at the Leader Street train crossing, the boundary follows Leader Street until Goodwood Road.  The boundary then follows Parsons Street and crosses the tramline.  Finally the southern boundary follows Simpson Parade.  The east boundary is King William Road and the western boundary is the train tracks.  Keswick Creek flows through the southern side of the suburb.

First Friday (public event): "First Friday" is a name for various public events in some cities (particularly in the United States) that occur on the first Friday of every month.

Supporting paragraphs: Wayville, South Australia Royal Adelaide Show
Answer: Royal Adelaide Show