Complex sentence: There are more than 120 Historic-Cultural Monuments (HCM) in the Downtown Los Angeles area, which includes the Old Plaza Historic District, Little Tokyo, Chinatown, the Broadway Theater District, the Spring Street Financial District, and the Fashion District.
Split into simpler sentences: There are more than 120 Los Angeles Historic-Cultural Monuments (HCMs) in the Downtown Los Angeles area. These include the Old Plaza Historic District, Little Tokyo, Chinatown, the Broadway Theater District, the Spring Street Financial District, and the Fashion District.