Complex sentence: Kolettis was born at Syrrako, Epirus and studied medicine in Pisa, Italy were influenced by the Carbonari movement started planning his return to Epirus in order to participate to Greece's indepedence struggles.
Split into simpler sentences: Kolettis was born in Syrrako, Epirus and studied medicine in Pisa, Italy. He became influenced by the Carbonari movement and started planning his return to Epirus in order to participate to Greece's indepedence struggles.