Complex sentence: The flags flank a second, smaller tier with a semi-column at either end and culminates in a smaller plinth supporting a catafalque on which is a sculpture of a recumbent soldier draped with his coat.
Split into simpler sentences: The flags flank a second, smaller, tier which has a semi-column at either end and which culminates in a smaller plinth supporting a catafalque. At the top is a sculpture of a recumbent soldier draped with his coat.