About: http://webisa.webdatacommons.org/149508988

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	Maybe you have already figured out a satisfactory answer to your original question, but in case not, here is a purely computational method for finding the decomposition you seek.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net