Question: What year did flower show that is, held annually in the same site as the Royal Exhibition Building in Melbourne, Australia, begin?

Context paragraphs:
Pakistan Flower Show: The Pakistan Flower Show is an annual flower show and a festival held every year in Karachi, Pakistan.  It is held at the Sea View Park in Karachi.  It is organized by the Horticulture Society of Pakistan.  It was established in 1948 and held every year in February.  The 60th festival was held on February 26, 2011 and 61st will held on February 23–26, 2012.

Exhibition Street, Melbourne: Exhibition Street is a major street in the central business district of Melbourne, Australia.  The street is named after the International Exhibition held at the Royal Exhibition Building in 1880, and was previously known as Stephen Street from 1837.  The street runs roughly north-south and was laid out as part of the original Hoddle Grid.

Southport Flower Show: Southport Flower Show, held at Victoria Park in Southport, is the largest independent flower show in the United Kingdom.  It was originally started in 1924 by the local council, but since 1986 has been operated by Southport Flower Show company, which is a registered charity.  It is held annually for four days in late August and has attendances of over 80,000.  The patron of Southport Flower Show since 1996 is Professor Stefan Buczacki.

Melbourne International Flower and Garden Show: The Melbourne International Flower and Garden Show is a flower show held annually since 1995 in early April each year, in Melbourne, Australia.  It is located in the World Heritage Site of Carlton Gardens and the Royal Exhibition Building.  It is the largest horticultural event in the southern hemisphere, attracting over 100,000 visitors.  It is rated among the top five flower and garden shows in the world.

Brickvention: Brickvention is an annual volunteer-run fan-based Lego convention held in Victoria, Australia.  The most recent Brickvention was held in January 2015 at the Royal Exhibition Building in Melbourne, and sold 25,000 tickets.  In 2016 it will celebrate its 10th anniversary.

The Big Picture (painting): The Opening of the First Parliament of the Commonwealth of Australia by H.R.H.  The Duke of Cornwall and York (later H.M. King George V), May 9, 1901, more commonly known in Australia as The Big Picture, is a 1903 painting by the Australian artist Tom Roberts.  The painting, measuring 304.5 x , or roughly 10 by 17 feet, depicts the opening of the first Parliament of Australia at the Royal Exhibition Building in Melbourne on 9 May 1901.

Hampton Court Palace Flower Show: The Hampton Court Palace Flower Show is the largest flower show in the world.  The Show is held in early July, and run by the Royal Horticultural Society (RHS) at Hampton Court Palace in southwest London.  The show features show gardens, floral marquees and pavilions, talks and demonstrations.  Erected on the north and south sides of the Long Water in Hampton Court Park, it is the second major national show after the Chelsea Flower Show but has a different character, focusing more on environmental issues, growing your own food and vegetables and cookery, while also offering opportunities to buy gardening accessories, plants and flowers.

Royal Exhibition Building: The Royal Exhibition Building is a World Heritage Site-listed building in Melbourne, Australia, completed in 1880.  It is located at 9 Nicholson Street in the Carlton Gardens, flanked by Victoria, Carlton and Rathdowne Streets, at the north-eastern edge of the central business district.  It was built to host the Melbourne International Exhibition in 1880–81 and later hosted (in the Western annex) the opening of the first Parliament of Australia in 1901.  Throughout the 20th century smaller sections and wings of the building were subject to demolition and fire; however, the main building, known as the Great Hall, survived.

Flag Day (Australia): In Australia, Australian National Flag Day is celebrated on 3 September.  It commemorates the day in 1901 on which the Australian National Flag was first flown.  On that day Prime Minister Edmund Barton announced the winners of a competition to design a flag for Australia.  A large flag, 5.5 by , was flown over the dome of the Royal Exhibition Building in Melbourne.

Museums Victoria: Museums Victoria is an organisation which operates three major state-owned museums in Melbourne, Victoria, Australia, the Melbourne Museum, the Immigration Museum and Scienceworks.  It also manages the Royal Exhibition Building and a storage facility in Melbourne's City of Moreland.

Supporting paragraphs: Melbourne International Flower and Garden Show Royal Exhibition Building
Answer: 1995