Complex sentence: Count Alessandro Contini-Bonacossi (18 March 1878-22 October 1955) was an Italian art collector and dealer who, through Walter Hofer, sourced art for the Göring Collection.
Split into simpler sentences: Count Alessandro Contini-Bonacossi (18 March 1878-22 October 1955) was an Italian art collector and dealer. Through Walter Hofer, Contini-Bonacossi sourced art for the Göring Collection.