About: http://webisa.webdatacommons.org/243321041

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	In some cases, however, there is a theoretical reason for believing that a third, mediating variable can explain the relationship.
http://www.w3.org/ns/prov#wasQuotedFrom	unc.edu