Complex sentence: He was the most prominent woodcarver in Hedmark in the early 18th century, and his works influenced later artists in Hedmark and Oppland, in particular in the valley of Gudbrandsdalen.
Split into simpler sentences: He was the most prominent woodcarver in Hedmark in the early 18th century. His works influenced later artists in Hedmark and Oppland, in particular in the valley of Gudbrandsdalen.