Complex sentence: John Arnold, widely known as John Arnold of Monmouthshire (c.1635-1702) was a Welsh Protestant and politician and MP and one of the most prominent people in Monmouthshire in the late 17th century.
Split into simpler sentences: John Arnold, widely known as John Arnold of Monmouthshire (c.1635-1702) was a Welsh Protestant, politician, and MP. He was one of the most prominent people in Monmouthshire in the late 17th century.