Complex sentence: His reign is generally dated 874 to 879 based on a Mercian regnal list which gives him a reign of five years, but D. P. Kirby argues that he probably reigned into the early 880s.
Split into simpler sentences: His reign is generally dated 874 to 879 based on a Mercian regnal list which gives him a reign of five years. But D. P. Kirby argues that he probably reigned into the early 880s.