Original sentence: Its main avenues: La Marina, Universitaria and Elmer Faucett are important economic centres.Plaza San Miguel mall, some hypermarkets and department stores are located in the intersection of La Marina and Universitaria
Edited sentence: Its main avenues: La Marina, Universitaria and Elmer Faucett are among the largest economical activity centres in the city.The intersection of the two first avenues has been chosen by private investors; the Plaza San Miguel mall and some hypermarkets and department stores are all located in this area