Complex sentence: Swami Satyananda assigned Swami Sivamurti to carry the message of yoga to Greece and, through his inspiration and guidance, in 1978 she instituted Satyanandashram Hellas (beginning at Kalamata and then expanding to Athens, Thessaloniki and other parts of the Greek mainland and islands).
Split into simpler sentences: Swami Satyananda assigned Swami Sivamurti to carry the message of yoga to Greece. Through his inspiration and guidance, in 1978 Swami Sivamurti instituted Satyanandashram Hellas (beginning at Kalamata and then expanding to Athens, Thessaloniki and other parts of the Greek mainland and islands).