Question: When was the club formed that contested the 1984 WAFL Grand Final against East Fremantle ?

Context articles: 1979 WANFL Grand Final
Swan Districts Football Club
2012 WAFL Grand Final
1984 WAFL season
2012 WAFL season
1985 WAFL season
East Fremantle Football Club
1997 Westar Rules Grand Final
East Fremantle Oval
1980 WAFL Grand Final

The 1979 WANFL Grand Final was an Australian rules football game contested between the East Fremantle and South Fremantle Football Clubs, held at Subiaco Oval on 22 September 1979.
 It was the 49th annual Grand Final of the West Australian National Football League, staged to determine the premiers for the 1979 WANFL season.
 The match, attended by 52,781 spectators, the record crowd for a football match at Subiaco, was won by East Fremantle by a margin of 33 points, marking that club's 25th premiership victory.
The Swan Districts Football Club, nicknamed the Swans, is an Australian rules football club playing in the West Australian Football League (WAFL).
 The club is based at Bassendean Oval, in Bassendean, an eastern suburb of Perth, Western Australia.
 The club was formed in 1932, and joined the then-Western Australian National Football League (WANFL) in 1934, acting as a successor to the Midland Junction Football Club, which had disbanded during World War I, in the Perth Hills region.
The 2012 WAFL Grand Final was an Australian rules football game contested between the Claremont Football Club and the East Fremantle Football Club on Sunday 23 September 2012 at Patersons Stadium, to determine the premier team of the West Australian Football League (WAFL) for the 2012 season.
 Claremont won an exciting game by 26 points - 18.16 (124) to 15.8 (98) - and Paul Medhurst of Claremont was awarded the Simpson Medal.
 The win, which gave Claremont's its 12th WAFL premiership, was also the first time the Tigers had won successive flags since their 1938-1940 hat-trick.
The 1984 WAFL season was the 100th season of the West Australian Football League and its various incarnations.
 The season opened on 31 March and concluded on 22 September with the 1984 WAFL Grand Final contested between East Fremantle and Swan Districts .
The 2012 WAFL season was the 128th season of the West Australian Football League and its various incarnations.
 The season opened on 17 March, with Subiaco hosting West Perth at Leederville Oval, and concluded with the 2012 WAFL Grand Final, in which Claremont defeated East Fremantle by 26 points.
 The 2012 Sandover Medal was won by Kane Mitchell of Claremont, while the leading goalkicker was South Fremantle 's Ben Saunders.
The 1985 WAFL season was the 101st season of the West Australian Football League and its various incarnations.
 The season opened on 30 March and concluded on 21 September with the 1985 WAFL Grand Final contested between East Fremantle and Subiaco .
The East Fremantle Football Club, nicknamed the Sharks, is an Australian rules football club playing in the West Australian Football League (WAFL).
 The team's home ground is ATOM Stadium (East Fremantle Oval).
 East Fremantle are the most successful club in WAFL history, winning 29 premierships since their entry into the competition in 1898.
The 1997 Westar Rules Grand Final was an Australian rules football game contested between the South Fremantle Football Club and the East Fremantle Football Club, on 21 September 1997 at Subiaco Oval, to determine the premier team of the Westar Rules (known previously and since as the West Australian Football League, WAFL) for the 1997 season.
 South Fremantle won the game by 6 points, 13.7 (85) to 11.13 (79), with David Hynes of South Fremantle winning the Simpson Medal as best on ground.
East Fremantle Oval (known under a sponsorship agreement as Atom Stadium and nicknamed "Shark Park",) is an Australian rules football ground located in East Fremantle, Western Australia.
 The ground was opened in 1906, and underwent a large redevelopment in 1953.
 It current serves as the home ground of the East Fremantle Football Club in the West Australian Football League (WAFL).
 East Fremantle Oval has a capacity of around 20,000 people, but has hosted in excess of this number previously, with a record crowd of 21,317 for a match between East Fremantle and South Fremantle in 1979.
The 1980 WAFL Grand Final was an Australian rules football game contested between the South Fremantle Football Club and the Swan Districts Football Club, on 27 September 1980 at Subiaco Oval, to determine the premier team of the West Australian Football League (WAFL) for the 1980 season.
 South Fremantle won the game by 58 points, 23.18 (156) to 15.8 (98), with Maurice Rioli of South Fremantle winning the Simpson Medal as best on ground.