Question: Which former professional Australian was warded the Norm Smith Medal in 2013 AFL Grand Final

Context paragraphs:
2017 AFL Grand Final: The 2017 AFL Grand Final was an Australian rules football game contested between the Adelaide Crows and the Richmond Tigers, held at the Melbourne Cricket Ground on 30 September 2017.  It was the 121st annual Grand Final of the Australian Football League (formerly the Victorian Football League), staged to determine the premiers of the 2017 AFL season.  Richmond defeated Adelaide by 48 points, marking the club's eleventh premiership, their first since 1980.  Richmond's Dustin Martin won the Norm Smith Medal as the best player on the ground.  The match was attended by 100,021 people, the highest crowd since the 1986 Grand Final.

2015 AFL Grand Final: The 2015 AFL Grand Final was an Australian rules football match contested between the Hawthorn Football Club and the West Coast Eagles at the Melbourne Cricket Ground on 3 October 2015.  It was the 119th annual Grand Final of the Australian Football League (formerly the Victorian Football League), staged to determine the premiers for the 2015 AFL season.  The match, attended by 98,632 spectators, was won by Hawthorn by a margin of 46 points, marking the club's third consecutive premiership and thirteenth VFL/AFL premiership victory overall.  Hawthorn's Cyril Rioli was awarded the Norm Smith Medal as the best player on the ground.

Norm Smith Medal: The Norm Smith Medal is the award given in the AFL Grand Final to the player adjudged by an independent panel of experts to have been the best player in the match.

2011 AFL Grand Final: The 2011 AFL Grand Final was an Australian rules football game contested between the Collingwood Football Club and the Geelong Football Club, held at the Melbourne Cricket Ground on 1 October 2011.  It was the 115th annual Grand Final of the Australian Football League (formerly the Victorian Football League), staged to determine the premiers for the 2011 AFL season.  The match, attended by 99,537 spectators, was won by Geelong by a margin of 38 points, marking the club's ninth VFL/AFL premiership victory.  Geelong's Jimmy Bartel was awarded the Norm Smith Medal as the best player on the ground.

Brian Lake: Brian Lake (born Brian Harris; 27 February 1982) is a former professional Australian rules footballer who played for the Western Bulldogs and Hawthorn Football Club in the Australian Football League (AFL).  He now plays for his local club Caroline Springs in the West Region Football League, who won their first premiership in 2016.

Byron Pickett: Byron Pickett (born 11 August 1977) is a former professional Australian rules footballer who played with three clubs in the AFL.  He was known as a big game player as well as for his strength, hard bumps and tough approach to the game.  Pickett is one of 12 players with two premiership medallions, a Norm Smith Medal and over 200 AFL games.  In 2005 Pickett was acknowledged as one of the finest Aboriginal players in the history of the game, with his selection to the Indigenous Team of the Century.  He announced his retirement from AFL at the end of the 2007 season.

2014 AFL Grand Final: The 2014 AFL Grand Final was an Australian rules football game contested between Sydney Swans and the Hawthorn Football Club at the Melbourne Cricket Ground on 27 September 2014.  It was the 118th annual Grand Final of the Australian Football League (formerly the Victorian Football League), staged to determine the premiers for the 2014 AFL season.  The match, attended by 99,460 spectators, was won by Hawthorn by a margin of 63 points, marking the club's second consecutive premiership and twelfth VFL/AFL premiership victory overall.  Hawthorn's Luke Hodge was awarded the Norm Smith Medal as the best player on the ground.

2016 AFL Grand Final: The 2016 AFL Grand Final was an Australian rules football match contested between the Sydney Swans and the Western Bulldogs .  It was the 120th annual Grand Final of the Australian Football League (formerly the Victorian Football League), staged to determine the premiers of the 2016 AFL season.  It was the Swans' fifth grand final appearance since 2005, while the Bulldogs were competing in their first grand final since 1961.  The match, played at the Melbourne Cricket Ground in front of 99,981 spectators, was won by the Bulldogs by a margin of 22 points, marking their second VFL/AFL premiership victory and first since 1954, breaking a 62-year premiership drought.  It was also the first time in VFL/AFL history that a team won the premiership from seventh place on the ladder.  Jason Johannisen of the Bulldogs was awarded the Norm Smith Medal as the best player on the ground.

2013 AFL Grand Final: The 2013 AFL Grand Final was an Australian rules football game contested between Hawthorn Football Club and Fremantle Football Club at the Melbourne Cricket Ground on 28 September 2013.  It was the 117th annual Grand Final of the Australian Football League (formerly the Victorian Football League), staged to determine the premiers for the 2013 AFL season.  The match, attended by 100,007 spectators, was won by Hawthorn by a margin of 15 points, marking the club's eleventh VFL/AFL premiership victory.  Hawthorn's Brian Lake was awarded the Norm Smith Medal as the best player on the ground.

2012 AFL Grand Final: The 2012 AFL Grand Final was an Australian rules football game contested between the Hawthorn Football Club and the Sydney Swans at the Melbourne Cricket Ground on 29 September 2012.  It was the 116th annual Grand Final of the Australian Football League (formerly the Victorian Football League), staged to determine the premiers for the 2012 AFL season.  The match, attended by 99,683 spectators, was won by Sydney by 10 points, marking the club's fifth VFL/AFL premiership victory.  Sydney's Ryan O'Keefe was awarded the Norm Smith Medal as the best player on the ground.

Supporting paragraphs: 2013 AFL Grand Final Brian Lake
Answer: Brian Lake