About: http://webisa.webdatacommons.org/113875387

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	So my suggestion, for a seven year old, would be a simpler truth: WW2 happened because the Germans tried to take over the world, and other countries didn't want to be taken over so they fought back and won.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com