Question: Who replaced Neil Craig as a coach in 2011 after round 18 and played for the Crows from 1991 -2003?
Context: Dean Bailey (18 January 1967 – 11 March 2014) was an Australian rules football player and coach.  He played for the Essendon Football Club and was the senior coach of the Melbourne Football Club, as well as an assistant coach at Essendon and Port Adelaide and the Strategy & Innovation Coach at the Adelaide Football Club (Adelaide Crows).  Bailey died of lung cancer on 11 March 2014. Marcus White (born 26 October 1991) is a former professional Australian rules football player at the North Melbourne Football Club in the Australian Football League (AFL).  He made his first appearance at the senior level in the 2010 AFL season.  White made his debut in Round 18, against the Western Bulldogs . Elliott Kavanagh (born 19 May 1993) is a former professional Australian rules footballer who played for the Essendon Football Club in the Australian Football League (AFL).  He was recruited by the club in the 2011 National Draft, with pick 19.  Kavanagh made his debut in round 18, 2012, against Hawthorn at Docklands Stadium.  He was delisted in October 2015. The 2010 AFL season was the Adelaide Crows 20th season in the AFL on the back of a 5th place and a semi-final exit in the 2009 AFL season.  It was Neil Craig's 7th season at the helm after taking over from Gary Ayres as coach in 2004.  The captain for this season was Simon Goodwin and the leadership group consisted of Brad Symes, Scott Stevens, Nathan van Berlo, Ben Rutten, Michael Doughty, Brett Burton and Tyson Edwards. The 2011 AFL season was the Adelaide Crows 21st season in the AFL.  Neil Craig was appointed coach, but was replaced by Mark Bickley after round 18. Kun Xian Ho () (born 1991), or just Xian, is a Singaporean professional fighting games player.  Xian is currently part of Team Razer.  He was the winner of "Ultra Street Fighter 4" at DreamHack Winter 2015.  At Capcom Cup 2015 he got third place after being eliminated by eventual runner-up Daigo Umehara.  He beat Yusuke Momochi at Final Round 18.  Xian plays Gen as his character of choice, as his stances allowed Xian more options.  He stated that Gen was a very underestimated character that people have compared to Dan Hibiki and have easily dismissed as weak. Kosef made his first-grade debut for Manly in a round 18 match of 1992 against the Penrith Panthers.  He played for the club and its related successor the Northern Eagles for ten consecutive seasons although his last three years were interrupted by injury. Liam Jones (born 24 February 1991) is an Australian rules footballer for the Carlton Football Club.  He was drafted by Australian Football League (AFL) club Western Bulldogs in the second round of the 2008 AFL Draft.  He made his debut against North Melbourne in round 18 of the 2010 season.  On 16 October 2014, Jones was traded to the Carlton Football Club. Timmins played junior football in Kiama and debuted as a seventeen-year-old for the Steelers in round 18 of 1994 against the Cronulla-Sutherland Sharks.  He was later named the Steelers' Rookie of the year.  Timmins played 86 games for the Illawarra Steelers and was a foundation player in the joint venture St George Illawarra Dragons in 1999.  He played at centre in the 1999 NRL Grand Final loss to the Melbourne Storm.  Timmins was first selected for the Australian team to compete in the end of season 1999 Rugby League Tri-Nations tournament.  In the final against New Zealand he played from the interchange bench in the Kangaroos' 22-20 victory. Mark Alan Bickley (born 4 August 1969)is a former professional Australian rules footballer who played for the Adelaide Football Club in the Australian Football League (AFL).  Bickley was a player for the Crows from 1991 until 2003, captaining the team to both the 1997 and 1998 AFL premierships.  He was a media commentator, most notably with Channel 9 in Adelaide as their sports presenter.  In 2011 he had a brief coaching career as caretaker coach of the Crows after the retirement of Neil Craig.
Answer: Mark Bickley