Complex sentence: Its population is mostly concentrated near the coast, and the city of Ancona, its capital, accounts for nearly a quarter of it; the other principal towns are Castelfidardo, Chiaravalle, Fabriano, Falconara Marittima, Jesi, Loreto, Osimo, and Senigallia.
Split into simpler sentences: Its population is mostly concentrated near the coast, and the city of Ancona, its capital, accounts for nearly a quarter of it. Other main towns are Castelfidardo, Chiaravalle, Fabriano, Falconara Marittima, Jesi, Loreto, Osimo, and Senigallia.