About: http://webisa.webdatacommons.org/37688467

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	Another desirable feature of this mechanism is that another checkmark-ack request can be initiated at any time, even if there is a pending one.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca