Complex sentence: Martianus appears to have been a lay teacher all his adult life-there is no indication he was a monk-apparently settling at Laon in the late 840s, during the term of bishop Pardule.
Split into simpler sentences: Martianus appears to have been a lay teacher all his adult life; there is no indication he was a monk. He settled at Laon in the late 840s, during the term of bishop Pardule.