Complex sentence: On September 17,2016, as part of a string of several terrorist bombings in New York and New Jersey, a pressure cooker bomb exploded on West 23rd Street between Sixth Avenue and Seventh Avenue, injuring 31 people.
Split into simpler sentences: On September 17,2016, several bombs detonated in New York and New Jersey. One of these a pressure cooker bomb that exploded on West 23rd Street between Sixth Avenue and Seventh Avenue, injuring 31 people.