Complex sentence: Turnau recognized that Martina was a major talent that just needed proper training, and, after the workshop ended, he introduced her to voice instructor Marinka Gurewich, who immediately took Arroyo on as a student.
Split into simpler sentences: Turnau recognized that Martina was a major talent, and just needed proper training. After the workshop ended, he introduced her to voice instructor Marinka Gurewich, who immediately took Arroyo on as a student.