About: http://webisa.webdatacommons.org/51491425

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	They are designated as N or P, depending on whether they are negative or positive, followed by a number that indicates their timing (or latency).
http://www.w3.org/ns/prov#wasQuotedFrom	alzforum.org