Complex sentence: Uijeongbu is home to several educational establishments, most of which are available to both South Korean citizens and foreign nationals, some schools, however, are only accessible to the families, and other affiliates of the US Army.
Split into simpler sentences: Uijeongbu is home to several educational establishments, most of which are available to both South Korean citizens and foreign nationals. Some schools, however, are only accessible to the families and other affiliates of the US Army.