Complex sentence: The best preserved inlaid object is the Standard of Ur, found in one of the royal tombs of this city, which represents two principal scenes on its two sides: a battle and a banquet that probably follows a military victory.
Split into simpler sentences: The best preserved inlaid object is the Standard of Ur found in one of the royal tombs of this city. It represents two principal scenes on its two sides: a battle and a banquet that probably follows a military victory.