Complex sentence: Cataldo Baglio, better known simply as Aldo, born in Palermo but always living in Milan, we met Giovanni Storti; together studying mime and dance in school melodrama of the Teatro Arsenale of Milan.
Split into simpler sentences: Cataldo Baglio, better known simply as Aldo, was born in Palermo but always lived in Milan, where he met Giovanni Storti. The two were both studying mime and dance in the School of drama of the Teatro Arsenale of Milan.