Complex sentence: The early part of the work is in many cases based on Adam of Bremen's "Descriptio insularum Aquilonis", sometime even direct quotes, however the author only takes what he needs and the meaning is not always the same.
Split into simpler sentences: The early part of the work is in many cases based on Adam of Bremen's "Descriptio insularum Aquilonis", sometimes even direct quotes. The author only takes what he needs, however, and the meaning is not always the same.