About: http://webisa.webdatacommons.org/374564339

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	As you note, if you perform Y + X where Y is a very big value and X is a very small one, you will end up with just Y .... but if X and Y are both in the same ball-park size-wise, then the problem is much reduced.
http://www.w3.org/ns/prov#wasQuotedFrom	eetimes.com