Question: The railway that only operated during the yearly agricultural event known colloquially as "The Show" can be found operating in what country?

Context articles: Showground Central railway line
Mold-A-Rama
AgQuip
Dutchess County Fair
Caterpillar (ride)
Pennsylvania Farm Show
Young People for a United World
Surf Ballroom
Carrosserie Hess
Royal Adelaide Show

The Showground Central railway line was a special suburban line in the city of Adelaide, South Australia which only operated during the Royal Adelaide Show.
Mold-A-Rama is a brand name for a type of vending machine that makes injection molded plastic figurines.
 Mold-A-Rama machines debuted in late 1962 and grew in prominence at the 1964 New York World's Fair.
 The machines can still be found operating in dozens of museums and zoos.
AgQuip is Australia's largest and premier primary industry field days and one of the largest agricultural events in the world.
 The nation's biggest agricultural event showcases over 3,000 individual companies and attracts over 100,000 visitors from across the nation and overseas.
 The event runs over three days, Tuesday to Thursday, in August, eight kilometres west of Gunnedah, New South Wales.
 The site on Blackjack Road covers 26 hectares.
The Dutchess County Fair is held annually in Rhinebeck, New York, usually during the last full week in August.
 The fair was started in 1845 mainly as an old-fashioned agricultural event in which farmers would come and show off their livestock and crops.
 Currently, the fair hosts approximately half a million people per year, and is the second largest county Fair in New York State.
The Caterpillar ride is a vintage flat ride engineered by the inventor Hyla F. Maynes of North Tonawanda, New York who dubbed it the Caterpillar when it debuted in Coney Island, NY in 1925 generates a decent helping of centrifugal force, causing the riders on the inside of the seats to crush the riders on the outside of the seats.
 It was once found at nearly every amusement park around the USA, but is now so rare that an original Caterpillar ride can only be found operating in two parks today.
 Though only two Caterpillars are known to be operating, there have been reports claiming there are additional Caterpillars in storage or standing (but not operating) at a few other parks.
The Pennsylvania Farm Show is held every January at the Pennsylvania Farm Show Complex & Expo Center, located in Harrisburg, Pennsylvania, just off Exit 67 of Interstate 81.
 This event, Pennsylvania's state fair, was first held in 1917.
 It is the largest indoor agricultural event held in the United States.
 The Farm Show Complex houses 24 acre under its roof, spread throughout eleven buildings, including three arenas.
 The annual event is free to the public and attracts over half a million visitors.
Young People for a United World or YPUW ("Giovani Per Un Mondo Unito") is a group of young people of different races, cultures and beliefs committed to living for a United World.
 YPUW was first launched in 1985 at a Focolare youth event known as a Genfest.
 The group was founded by Chiara Lubich of the Focolare Movement.
 Since 1996 the YPUW have organised an annual worldwide event known as World Unity Week.
 The 2007 World Unity Week took place between October 14 and 21.
The Surf Ballroom (the Surf) is a Historic Rock and Roll Landmark at 460 North Shore Drive, Clear Lake, Iowa.
 The Surf is closely associated with the event known colloquially as "The Day the Music Died" - early rock and roll stars Buddy Holly, Ritchie Valens, and J. P. "The Big Bopper" Richardson gave their last performances at the Surf on February 2, 1959 as part of the "Winter Dance Party Tour".
Carrosserie Hess AG is a bus, trolleybus and commercial vehicle manufacturer based in Bellach (near Solothurn), Switzerland.
 Its products can be found operating in several countries, including the United States and Canada.
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.