Complex sentence: Currently, American Samoa, Guam, the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands are inhabited, with non-permanent populations at Palmyra Atoll, Wake Island and Midway Atoll.
Split into simpler sentences: Currently, American Samoa, Guam, the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands are inhabited. There are non-permanent human populations at Palmyra Atoll, Wake Island and Midway Atoll.