Complex sentence: His grandfather Charlemange died in 814 at age 72, and his father, Louis, became Emperor.3 years later in 817, Arnulf, aged 23, was appointed count of Sens in Burgundy.
Split into simpler sentences: His grandfather Charlemange died in 814 at age 72, and his father, Louis, became Emperor. Three years later in 817, Arnulf, aged 23, was appointed count of Sens in Burgundy.