Complex sentence: Dimitris Rontiris (Greek: Δημήτρης Ροντήρης, Piraeus 1899-1981) was a Greek actor and director who began at a military school in which he left with grace for studying law at the University of Athens.
Split into simpler sentences: Dimitris Rontiris (Greek: Δημήτρης Ροντήρης, Piraeus 1899-1981) was a Greek actor and director. Rotiris began at a military school in which he left with grace for studying law at the University of Athens.