Complex sentence: Tchernyshev currently skates in ice shows in Russia and the U.S. He has choreographed for Yuko Kavaguti and Alexander Smirnov (2011--2012 short program and 2010--2012 free program) and Sinead Kerr and John Kerr (2010--2011 free dance).
Split into simpler sentences: Tchernyshev currently skates in ice shows in Russia and the U.S. He has done choreography for competitive skaters. Tchernyshev choreographed for Yuko Kavaguti and Alexander Smirnov (2011--2012 short program and 2010--2012 free program) and Sinead Kerr and John Kerr (2010--2011 free dance).