Complex sentence: Rousseau claimed he had "no teacher other than nature", although he admitted he had received "some advice" from two established Academic painters, Félix Auguste Clément and Jean-Léon Gérôme.
Split into simpler sentences: Rousseau claimed he had "no teacher other than nature". He admitted he had received "some advice" from two established Academic painters, Félix Auguste Clément and Jean-Léon Gérôme.