Question: What is the name of Adelaide, South Australia's biggest and most popular event, attended by up to half a million people every year, held in the Adelaide Showground?

<P0-S0> Pirate Station (Russian: Пиратская станция ) was the world's biggest drum and bass music festival. <P0-S1>  It's held every year since 2003, when St. Petersburg held the first event. <P0-S2>  It has spread to the biggest Russian cities (Moscow, Ekaterinburg, Novosibirsk, Samara etc.) and has also taken place in Estonia and Ukraine, which makes Pirate Station the biggest Russian dance project ever. <P0-S3>  Almost half a million people visited the festival during these years. <P0-S4>  The main St. Petersburg show hosts more than 25,000 fans annually. <P0-S5>  Pirate Station is not just about music – it is a mix of unique performances and special effects united by a concept which changes every year. <SEP> <P1-S0> The Adelaide Showground holds many of Adelaide's most popular events, including the Royal Adelaide Show. <SEP> <P2-S0>  The Show always begins on the first Friday in September, and runs for 10 days (9 until 2013). <P2-S1> 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. <P2-S2>  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. <SEP> <P3-S0> The Kiama Showground is a sports and entertainment complex of the South Coast-Illawarra region in the coastal town of Kiama. <P3-S1>  The complex includes two ovals, the Showring and Chittick Oval. <P3-S2>  The showground is the host site of the Kiama Show which has operated for more than a hundred years. <P3-S3>  The show is held in late January each year (around Australia Day) and run by one of the five oldest Agricultural Show Societies in Australia. <P3-S4>  The showground's pavilion is the only community hall in Kiama. <P3-S5>  The pavilion and grandstand at the Kiama Showground has undergone a major re-development which was publicly opened by NSW governor Marie Bashir in August 2009. <P3-S6>  Kiama Showground is also the home ground to Group 7 Rugby League side, the Kiama Knights, a club where international players Shaun Timmins, Brett and Josh Morris learnt their trade. <P3-S7>  Kiama Rugby Union Club also plays its home games out of Kiama Showground. <P3-S8>  Kiama Touch Association also uses the ground for competition. <P3-S9>  As a part of Crown land, the surface is open to public, and many schools in the area also use the ground for sports events. <P3-S10>  The ground and pavilion are also used for various other concerts and special events. <P3-S11>  The pavilion itself can even be booked for corporate events, wedding receptions, conferences or other special functions, with facilities catering for 180 dining guests and a theatre setup for 330 people in the main "Norfolk room". <P3-S12>  Smaller rooms, "Saddlback room" and "Surf Beach room" seat 80 people combined (or 40 each as separate rooms), as well as the "Kendall room" seating a further 35 patrons.