About: http://webisa.webdatacommons.org/162790170

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	Specifically, Ag t (t)=1 means that the current group gt began at time t whereas Ag t (t)=0 means that the current group gt began at some time other than time t.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com