Complex sentence: Neither the dog's grave nor mummy have been recovered, but the tomb in which the tablet was unearthed is close to the western side of the Great Pyramid of Giza (Pyramid of Khufu/Kheops).
Split into simpler sentences: Neither the dog's grave nor mummy have been recovered. The tomb in which the tablet was unearthed is close to the western side of the Great Pyramid of Giza (Pyramid of Khufu/Kheops).