Complex sentence: Gabii was an ancient city of Latium, between 12 and 13 miles East of Rome, on the Via Praenestina, which was in early times known as the "Via Gabina".
Split into simpler sentences: Gabii was an ancient city of Latium, between 12 and 13 miles East of Rome. BNP 5,630-631, which was in early times known as the "Via Gabina".