Complex sentence: At the same time she started her career as a singer at the "Panorama" center of Thessaloniki, where Tolis Harmas coined the name "Marinella" for her, inspired by his song.
Split into simpler sentences: At the same time she started her career as a singer at the "Panorama" center of Thessaloniki. There, Tolis Harmas coined the name "Marinella" for her, inspired by his song.