Complex sentence: These forgeries are typically sold to art galleries and auction houses who cater to the tastes of art and antiquities collectors; during the occupation the painting which fetched the highest price at Drouot, the main French auction house, was a fake Cézanne.
Split into simpler sentences: These forgeries are typically sold to art galleries and auction houses who cater to the tastes of art and antiquities collectors. As a matter of fact, during the occupation the painting which fetched the highest price at Drouot, the main French auction house, was a fake Cézanne.