About: http://webisa.webdatacommons.org/441623320

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	Issues such as Nulls and uniqueness are mostly orthogonal to key concepts behind SMEQL. SMEQL is motivated mostly by expressiveness and meta ability with column info, not about fixing purity problems, although does not rule it out.
http://www.w3.org/ns/prov#wasQuotedFrom	c2.com