Complex sentence: On January 1,2008, Fischer had her unexpected public debut as a pianist, performing Edvard Grieg's Piano Concerto in A minor with the Junge Deutsche Philharmonie at the Alte Oper, Frankfurt.
Split into simpler sentences: On January 1,2008, Fischer had her unexpected public debut as a pianist. She performed Edvard Grieg's Piano Concerto in A minor with the Junge Deutsche Philharmonie at the Alte Oper, Frankfurt.