Question: When was the monument, worked on by Louis Laybourne Smith, in Adelaide, South Australia opened?

Context paragraphs:
St Ann's College: St Ann's College is a co-residential college in North Adelaide, South Australia.  In its early decades, the college had only female boarders.  Today it houses 185 tertiary students, both sexes, in single rooms; rooms in the new buildings have ensuites and all rooms have airconditioning.  Residents at St Ann's College have a diverse background with most coming from either rural Australia or overseas.  Members of the College attend three universities in South Australia, University of Adelaide, the University of South Australia and Flinders University.  St Ann's College is privately owned and run, and is not funded by government, church or university.  The current Principal of the College is Dr. Rosemary Brooks, who teaches at the University of Adelaide.

Geology of South Australia: South Australia is an Australian state, situated in the southern central part of the country, and featuring some low-lying mountain ranges, the most significant being the Mount Lofty Ranges, which extend into the state's capital city, Adelaide, which comprises most of the state's population.  Adelaide is situated on the eastern shores of Gulf St Vincent, on the Adelaide Plains, north of the Fleurieu Peninsula, between Gulf St Vincent and the low-lying Mount Lofty Ranges.  The state of South Australia, which stretches along the coast of the continent and has boundaries with every other state in Australia, with the exception of the Australian Capital Territory and Tasmania.  The Western Australia border has a history with South Australia, involving the South Australian Government Astronomer, Dodwell and the Western Australian Government Astronomer, Curlewis in the 1920s to mark the border on the ground.

Louis Laybourne Smith: Louis Laybourne Smith CMG (1 April 1880 – 13 September 1965) was an architect and educator in South Australia.  Born in the Adelaide inner-southern suburb of Unley, he became interested in engineering and architecture while in the goldfields of Western Australia and later studied mechanical engineering at the School of Mines, serving an apprenticeship under architect Edward Davies.  After graduating he accepted a position as a lecturer at the school, and was responsible for developing the first formal architecture course in the State in 1904.  Between 1905 and 1914, he served as registrar at the school before leaving to join his long-time friend, Walter Bagot, at the architectural firm of Woods, Bagot and Jory.  He remained with the firm until his death in 1965, and over the years was involved in a number of significant projects, including the South Australian National War Memorial and the original Australian Mutual Provident building on King William Street.

Adelaide United FC: Adelaide United Football Club is a professional soccer club based in Adelaide, South Australia, Australia.  The club participates in the A-League under licence from Football Federation Australia.  The club was founded in 2003 to fill the place vacated by Adelaide City and West Adelaide in the former National Soccer League (NSL), and is now the sole team from the state of South Australia in the A-League.  Adelaide United's home ground is Hindmarsh Stadium.  Adelaide United were premiers in the inaugural 2005–06 A-League season, finishing 7 points clear of the rest of the competition, before finishing third in the finals.  They were Premiers again in 2015/16 finishing just one point ahead of second place Western Sydney.  The Reds made the Grand Finals of the 2006–07, 2008–09 and 2015–16 seasons, losing the on the first two occasions to Melbourne Victory.

Crime in Adelaide: Crime in the city of Adelaide, South Australia has decreased significantly since the 2000s and is controlled by the South Australia Police (SAPOL) and the South Australia court system.  Adelaide has developed a reluctant reputation over the years as Australia's "crime capital", despite it being a relatively small city.  Perhaps one of Australia's most notorious and well known serial killing cases, the Snowtown murders, occurred primarily on the outskirts of Adelaide in the low socio-economic areas of Salisbury and Elizabeth.  This, as well as a series of unsolved murder cases in the 1970s, 1980s and early 1990s, known as "The Family Murders" led to one UK documentary dubbing Adelaide the "murder capital of Australia".  Various highly publicised kidnappings have occurred in the city, notably the unsolved Beaumont children disappearance on Australia Day in 1966.

Brighton Town Hall, Adelaide: Brighton Town Hall, Hove, is located on Brighton Road, Hove, in the city of Adelaide in South Australia.  The Brighton Town Hall was built in 1869 and was just the fourth Town Hall built in the colony of South Australia.  The architect and builder was George William Highet who arrived in the colony in 1836.  G. W. Highet served as a town clerk and Councillor and died in Brighton aged 80 years.  The hall was constructed of stone from Ayliffe’s quarry in the Adelaide Hills laid on concrete foundations.  The pioneers built it not just as a place for the business of Government but as a place "to serve the wants of the citizens" for many different activities.  On 10 May 1869 a foundation stone was laid by the Hon John Hodgkiss a member of the Legislative Council of South Australia in a ceremony attended by many of South Australia's most important pioneers.  Under this stone was placed a time capsule containing copies of the newspapers of the day.

Adelaide Symphony Orchestra: The Adelaide Symphony Orchestra (ASO) is an Australian orchestra based in Adelaide, South Australia.  Its primary venue is the Adelaide Town Hall, but the ASO also performs in other venues such as Elder Hall at the University of Adelaide and the Adelaide Festival Centre.  The ASO provides the orchestral support for all productions of the State Opera of South Australia, as well as the Adelaide performances of the Australian Ballet and Opera Australia.  The orchestra is also a regular featured ensemble at the Adelaide Festival.

Mount Lofty Botanic Garden: First opened in 1977, the crescent-shaped Mount Lofty Botanic Garden is situated on 97 hectares on the eastern slopes of Mount Lofty in the Adelaide Hills east of Adelaide in South Australia.  The cooler, wetter location suits plants from temperate climates which are difficult to grow on the Adelaide Plains.  Amongst the native Australian flora there are tree ferns, as well as exotic cultivated plants from cool climates including Rhododendron and Magnolia and the National Species Rose Collection.  The Mount Lofty Botanic Garden, together with the Adelaide and Wittunga Botanic Gardens, is administered by the Botanic Gardens of South Australia, a State Government statutory authority.

National War Memorial (South Australia): The National War Memorial is a monument on the north edge of the city centre of Adelaide, South Australia, commemorating those who served in the First World War.  Opened in 1931, the memorial is located on the corner of North Terrace and Kintore Avenue, adjacent to the grounds of Government House.  Memorial services are held at the site throughout the year, with major services on both Anzac Day (25 April) and Remembrance Day (11 November).

No Fixed Address (band): No Fixed Address is an Australian Aboriginal reggae rock group formed in 1979.  The band was led by Bart Willoughby (lead vocals and drums) Pitjanjatjara from Koonibba Mission near Ceduna in the far south west of South Australia, together with Ricky Harrison (rhythm guitarist and principal songwriter) Kurnai from Morwell in Victoria, Leslie Lovegrove Freeman (lead guitarist), Ngarrindjeri from Murray Bridge in South Australia, John Miller (bass) from Port Lincoln in South Australia and Veronica Rankine (tenor saxophone), Ngarrindjeri from the south east of South Australia.  Many members were related through family ties, Willoughby, Miller and Freeman were cousins.  Freeman, related to Harrison through marriage, recruited him from Victoria and they all met and formed the band at the Centre for Aboriginal Studies in Music (CASM) in North Adelaide, South Australia.

Supporting paragraphs: Louis Laybourne Smith National War Memorial (South Australia)
Answer: 1931