About: http://webisa.webdatacommons.org/227427451

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	Even 'secure' services may have implementation bugs in them, but using these services is a step in the right direction - and it is much easier than you might imagine.
http://www.w3.org/ns/prov#wasQuotedFrom	columbia.edu