Complex sentence: Sneferu, the first king of Dynasty IV, is given the credit of completing the first true pyramid, which he called the Red Pyramid, after he built and abandoned the Bent Pyramid and probably after he finished the Meidum Pyramid.
Split into simpler sentences: Sneferu, the first king of Dynasty IV, is given the credit of completing the first true pyramid. He called it the Red Pyramid, it was created after he built and abandoned the Bent Pyramid and probably after he finished the Meidum Pyramid.