About: http://webisa.webdatacommons.org/214320216

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	That is why, even in ML, signatures are declared explicitly.Wait, wait: Surely optional types avoid this problem?
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com