Complex sentence: The city has a large Brazilian community located in the neighborhoods just north and east of the downtown; it also has the largest West Indian and West African populations in the county; these groups mainly occupy the southwest corner of the city nearer to The Bronx borderline.
Split into simpler sentences: The city has a large Brazilian community located in the neighborhoods just north and east of the downtown; it also has the largest West African and West Indian populations in the county. These groups mainly occupy the southwest corner of the city near The Bronx borderline.