Complex sentence: The Petrie Museum of Egyptian Archaeology, London, exhibits a limestone head of an early egyptian king which the Museum identifies as being a depiction of Narmer on the basis of the similarity (according to Petrie) to the head of Narmer on the Narmer Palette.
Split into simpler sentences: The Petrie Museum of Egyptian Archaeology, London, exhibits a limestone head of an early egyptian king. The Museum identifies this sculpture as being a depiction of Narmer on the basis of the similarity (according to Petrie) to the head of Narmer on the Narmer Palette.