Complex sentence: As Madden began encroaching into rivals' territory, particularly the Hudson Dusters, he was ambushed and shot eleven times on November 6,1912 outside of a 52nd Street dance hall by three members of the Dusters.
Split into simpler sentences: As Madden began encroaching into rivals' territory, particularly the Hudson Dusters. On November 6,1912, he was ambushed and shot eleven times outside of a 52nd Street dance hall by three members of the Dusters.