Complex sentence: The "Odyssey" character Pontonous was the squire of King Alcinous of Phaeacia who, on the evening of Odysseus's escorted departure to Ithaca, mixed and took around the wine from which the Phaeacians made their libations to Zeus.
Split into simpler sentences: The "Odyssey" character Pontonous was the squire of King Alcinous of the Phaeacia. He it was who, on the evening of Odysseus's escorted departure to Ithaca, mixed and took around the wine from which the Phaeacians made their libations to Zeus.