Complex sentence: It was then procured by Alfred Bader who had it restored by the art dealer Otto Nauman they offered it for sale again in at the 2011 TEFAF art show in Maastricht for 47 million Euros.
Split into simpler sentences: It was then procured by Alfred Bader who had it restored by the art dealer Otto Nauman. They offered it for sale again in at the 2011 TEFAF art show in Maastricht for 47 million Euros.