Question: when was the former footballer from Sweden who as palyed in Kopparvallen born 

Context paragraphs:
Emmelie Konradsson: Emmelie Konradsson (born 9 April 1989) is a Swedish former footballer who played in midfield for Damallsvenskan club Umeå IK and the Sweden women's national football team.

Billy Ohlsson: Billy Ohlsson (born 13 January 1954 in Stockholm) is a Swedish football commentator, former football manager and former footballer.  He made six appearances for Sweden and scored two goals between 1978 and 1980.  He was the Allsvenskan top scorer in 1980 and 1984 seasons.

Thomas Hanzon: Sven Thomas Hanzon (born 20 June 1962) is a Swedish actor and stage actor at the Royal Dramatic Theatre in Stockholm and former footballer.  He was born in 1962 in Stockholm, Sweden.  He worked with Ingemar Bergman in both movies and on stage.  He has two children with Swedish actress Lena Endre and is now engaged to Åsa Hultman and living in Stockholm.

David Wilson (footballer, born 1969): David Graham Wilson (born 20 March 1969) is an English former footballer and football manager, who was last the manager of Ljungskile in the Swedish Superettan, the second level of football in Sweden.  As a player, he played as a centre midfielder for several English clubs, including Manchester United, Charlton Athletic and Bristol Rovers, in the late 1980s and early 1990s, before moving to Scandinavia, playing for various clubs in Finland and Sweden.

Mathias Florén: Mathias Florén (born 11 August 1976 in Söderhamn) is a Swedish former footballer who played as a left back.  His former teams are Alnö IF, GIF Sundsvall, IFK Norrköping, FC Groningen, IF Elfsborg and IF Sylvia.  He has played for the Sweden national football team.  Still playing som games for the u21 team.

Conny Torstensson: Conny Torstensson (born 28 August 1949) is a former footballer from Sweden.  With Sweden he participated at the World Cups 1974 FIFA World Cup and 1978 FIFA World Cup.  With Åtvidabergs FF he won national titles.  Later he belonged to the side of Bayern Munich which dominated international club football in the mid-1970s.

Kopparvallen: Kopparvallen is a multi-use stadium in Åtvidaberg, Sweden.  It is used mostly for football matches and is the home stadium of Åtvidabergs FF.  The stadium holds 8,000 people and was built in 1907.  Famous football players who have played in the arena is Ralf Edström, Roland Sandberg, Conny Torstensson, Zlatan Ibrahimović and Pelé.

Linnea Liljegärd: Linnea Viktoria Liljegärd (born 8 December 1988) is a Swedish former footballer who played for the Sweden women's national football team as well as professional clubs in Sweden, Norway and Russia.

Lasse Karjalainen: Lasse Karjalainen (born 22 October 1974) is a Finnish former footballer.  He was born in Sweden but spent most of his childhood at Pori, Finland.

Göran Enckelman: Göran Enckelman (born 14 June 1948) is a Finnish former footballer.  He played in both Finland and Sweden, and for the Finnish national side.  He is the father of fellow goalkeeper Peter Enckelman.  He won Finnish Footballer of the Year in 1975.

Supporting paragraphs: Kopparvallen Conny Torstensson
Answer: 28 August 1949