Complex sentence: In the late 10th century, Abbo of Fleury, Edmund's earliest biographer, His "Life" was commissioned to write a life of the saint, written in 985, which was translated into Old English by Ælfric of Eynsham.
Split into simpler sentences: In the late 10th century, Abbo of Fleury was commissioned to write a life of the saint and became Edmund's earliest biographer. Written in 985, the work was translated into Old English by Ælfric of Eynsham.