Complex sentence: The origin of the term "Okinawa" remains unclear, though there was a divine woman named Okinawa in the book "Omoro Soshi", a compilation of ancient poems and songs from Okinawa.
Split into simpler sentences: The origin of the term "Okinawa" remains unclear. There was a divine woman named Okinawa in the book "Omoro Sōshi", a compilation of ancient poems and songs from Okinawa.