About: http://webisa.webdatacommons.org/450474852

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	Make sure that your routine works for all cases, including the case where u=nil.
http://www.w3.org/ns/prov#wasQuotedFrom	nyu.edu