About: http://webisa.webdatacommons.org/357471770

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	Notice how the types of x and y are completely known, so it is relatively easy to completely type-specialize this code.
http://www.w3.org/ns/prov#wasQuotedFrom	mozilla.org