Question: When was the stadium Wollongong Wolves Football Club plays at opened?

Context paragraphs:
Wollongong Showground: Wollongong Showground, known as WIN Stadium for sponsorship reasons, is a multi-purpose stadium located in Wollongong, Australia.  The stadium was officially opened in 1911.  From 1982 until 1998 it played host to every home match for the Illawarra Steelers NRL team, and is still the team's home ground in the lower grade competitions.  It is now used as one home ground of the St George Illawarra Dragons rugby league side and Wollongong Wolves of the National Premier Leagues NSW.

Tangerang Wolves F.C.: Tangerang Wolves Football Club is an Indonesian football club based in Tangerang, Banten.  The team plays in the Liga Primer Indonesia

ŠNK Radgona: Športno Nogometni Klub Radgona (English: Sports Football Club Radgona ), commonly referred to as ŠNK Radgona or simply Radgona, is a Slovenian football club, which plays in the town of Gornja Radgona.  The club was established in 1946 as NK Radgona.  They currently play in the East division of the Slovenian Third League, the third tier of the Slovenian football pyramid.  Since the 2007–08 season the club plays under the name ŠNK Radgona ("Slovene: "Športno Nogometni Klub Radgona" ").  Previously, the club was named NK Radgona and NK Arcont Radgona (due to sponsorship reasons).  Since the 2014–15 season the club plays its home matches at the Gornja Radgona Stadium, located in the Gornja Radgona Sports Park, with a seating capacity for 301 spectators.  In summer 2016, the club's staff established a reserve team and registered it to the 2.  MNL (fifth tier) for the 2016–17 season but it was dissolved in summer 2017.  Radgona is currently managed by Boris Lazić who took charge of the team on 8 December 2016.

Trojans Rugby Football Club: The Trojans Rugby Football Club is an under-nineteen-year-old rugby club originally based out of Lassiter High School.  It is one of the original high school rugby clubs which are part of the Georgia High School Rugby Association (GHSRA).  The club was founded in 2005, and has made its mark on rugby in Georgia.  Matches and practices are held at Noonday Creek Park in Marietta.  Coach Randall Joseph has been the head coach since the club's founding, with Anthony "Bubba" Gautney as assistant coach.  The club has taken park in many tournaments and state final matches in Georgia and the Southeast United States.  A major goal of the Trojans Rugby Football Club is to teach and play the sport of rugby in the United States.  This is a great struggle throughout Georgia because of opposition from the high school's football coaches and athletic directors.  The club plays the most common version of rugby, called rugby union but often just referred to as rugby.  Although the club plays by rugby union rules, they also play by the rules of the International Rugby Board (IRB) for those under 19 years of age.  In the summer of 2011, the Trojan Rugby Football Club took part in another version of rugby called rugby sevens.  This variation of rugby is faster paced, with the same size fields but fewer people, and shorter half lengths.

Western Wolves FC: The Western Wolves Football Club is an association football club based in the western suburbs of Melbourne, Victoria, Australia.

Wollongong Wolves FC: Wollongong Wolves Football Club is an Australian semi-professional football club based in Wollongong, in the Illawarra region of New South Wales.  The club currently competes in the National Premier Leagues NSW, the second-tier of football in Australia.  The club plays its home games out of WIN Stadium.  The club has been successful throughout their history winning one continental championship, two national championships and two state championships.

2001 Oceania Club Championship: The 2001 Oceania Club Championships was held in January 2001.  The tournament was designed to decide the Oceania Football Confederation's entrant into the 2001 FIFA Club World Championship; however that Club World Championship tournament was cancelled by FIFA.  The competition was held in Port Moresby, Papua New Guinea, with all matches held at the Lloyd Robson Stadium.  The tournament was won by Australian club Wollongong Wolves.

South Coast United SC: South Coast United Soccer Club is an Australian association football club from the city of Wollongong, New South Wales.  The club was founded in 1984 by Wollongong's Croatian Australian community.  The club plays in the Illawarra Premier League.  The club is located at Kembla Grange and plays its home games at Ian McLennan Park.

University of Wollongong Titans: The University of Wollongong Titans (or UOW Titans) is an Australian rugby league football team based in Wollongong.  The club are a part of Country Rugby League and competes in the Illawarra Rugby League premiership.  The club plays out of University Oval, Wollongong.  The Titans wear red, navy and white jerseys.  An earlier team from the University of Wollongong were nicknamed the "Books".

List of Wollongong Wolves FC seasons: Wollongong Wolves FC is an association football club based in Wollongong, Australia.  The club was formed in 1980 as has competed at the highest tier of soccer in Australia.  Currently, the club participates in the National Premier Leagues NSW competition, which is the second highest tier of soccer in Australia.  The club has won one continental championship, two national championships and two state championships.

Supporting paragraphs: Wollongong Wolves FC Wollongong Showground
Answer: 1911