Complex sentence: After some years on the other side of the Atlantic Simone, that has failed in his American dream, understood that the States are not the right place for him so he returned to Italy with a ticket paid by his father.
Split into simpler sentences: After some years on the other side of the Atlantic, Pianetti, who failed in his American dream, understood that the States was not the right place for him. He returned to Italy with a ticket paid by his father.