David Wilson , Kim Yuna 's choreographer said that Adios Nonino is a very advanced program .
This piece was composed by Argentina 's tango virtuoso , Astor Piazzolla after his own father died .
David Wilson , Kim Yuna 's choreographer said that Adios Nonino is a very advanced program .
This piece was composed by Argentina 's tango virtuoso , Astor Piazzolla after his own father died .