Complex sentence: She began singing Turkish classical music at the age of four and during her primary school years performed Franz Schubert's "Ständchen" (aka "Serenade") and "Abends unter der Linde" on radio.
Split into simpler sentences: She began singing Turkish classical music at the age of four. During her primary school years, she performed Franz Schubert's "Ständchen" (aka "Serenade") and "Abends unter der Linde" on radio.