About: http://webisa.webdatacommons.org/448256366

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	A checkpoint is a point where a check is performed or a point or item, especially in a procedure, for notation, inspection, or confirmation.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com