Complex sentence: Ortigas Center is Metro Manila's second most important financial and central business district after the Makati Central Business District, it is located at the boundaries of Pasig City, Mandaluyong City, and Quezon City.
Split into simpler sentences: Ortigas Center is Metro Manila's second most important financial and central business district after the Makati Central Business District. It is located at the boundaries of Pasig, Mandaluyong, and Quezon City.