About: http://webisa.webdatacommons.org/449704298

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	I do not really know what the best one is at the moment (essentially you need to find the extremal function in my blown-up formulation to figure it out), but to improve upon $4$ is not hard at all.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net