Complex sentence: Adelard of Bath was a 12th Century English scholar who traveled widely, especially to Islamic lands and in addition to original work (some of which he attributed to Islamic scholars) translated Islamic works of astrology, astronomy and mathematics.
Split into simpler sentences: Adelard of Bath was a 12th century English scholar who traveled widely, especially to Islamic lands. In addition to original work (some of which he attributed to Islamic scholars), he translated Islamic works of astrology, astronomy and mathematics.