Complex sentence: Her son Plácido, who was only ten when his father died, played the violin from a young age, eventually performing in zarzuela and opera orchestras prior to becoming a professional baritone.
Split into simpler sentences: Her son Plácido, who was only ten when his father died, played the violin from childhood. Domingo eventually performed in zarzuela and opera orchestras as a violinist prior to becoming a professional baritone.