About: http://webisa.webdatacommons.org/104629977

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	Mass can not disappear outside of those parameters, though.Edit: The theory I mentioned is the most prominent one, but it is by no means 100% correct.
http://www.w3.org/ns/prov#wasQuotedFrom	battle.net