Complex sentence: Comic relief is provided by a sponger, Ergasilus, looking for a dinner, who uses his knowledge that Hegio's son Philopolemus has returned to Aetolia to get a free meal from Hegio and proceeds to go wild in the kitchen.
Split into simpler sentences: Comic relief is provided by a sponger, Ergasilus, looking for a free dinner from Hegio. He has learned that Hegio's son Philopolemus has returned to Aetolia, and he uses this knowledge to get a free meal from Hegio, then proceeds to go wild in the kitchen.