Complex sentence: It has 56 chapters, one in each of the 50 states and in New York City, Metro Washington D.C., Puerto Rico, the United States Virgin Islands, Guam, and an International chapter.
Split into simpler sentences: It has 56 chapters, one in each of the 50 states. Additional Chapters in New York City, Metro Washington D.C., Puerto Rico, the United States Virgin Islands, Guam, and an International chapter.