Complex sentence: Endeis was the daughter of either the Centaur Cheiron and the nymph Chariclo, or of Sciron of Megara and a daughter of Pandion of Athens.
Split into simpler sentences: Endeis was the daughter of either the Centaur Cheiron and the nymph Chariclo, or of Sciron of Megara. In the latter case her mother was either Chariclo or a daughter of Pandion of Athens.