Complex sentence: His father, Benjamin Frederik David Philips (1 December 1830--12 June 1900), being a first cousin of Karl Marx, was active in the tobacco business and a banker at Zaltbommel in the Netherlands.
Split into simpler sentences: His father, Benjamin Frederik David Philips (1 December 1830--12 June 1900) was a first cousin of Karl Marx. He was active in the tobacco business and a banker at Zaltbommel in the Netherlands.