About: http://webisa.webdatacommons.org/404027490

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	Using comparison operator (such as = or <>) to check for NULL is a mistake - a very common mistake.
http://www.w3.org/ns/prov#wasQuotedFrom	ntu.edu.sg