Complex sentence: The origin of the sandwich is unclear; despite its name, the sandwich has no connection to St. Paul, Minnesota; it was invented in St. Louis, Missouri and is only available in Chinese restaurants in the St. Louis metropolitan area.
Split into simpler sentences: The origin of the sandwich is unclear; despite its name, the sandwich has no connection to St. Paul, Minnesota. It was invented in St. Louis, Missouri and is only available in Chinese restaurants in the St. Louis metropolitan area.