Complex sentence: Her parents, Nicolas and Josefina, owned a laundry business in McAllen, a city in Hidalgo County, which is part of the South Texas border region known as the Rio Grande Valley.
Split into simpler sentences: Her parents, Nicolas and Josefina, owned a laundry business in McAllen, a city in Hidalgo County. McAllen is located in the South Texas border region known as the Rio Grande Valley.