About: http://webisa.webdatacommons.org/239270171

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	On page 612, the table that says how to obtain interactions between different types of variables.
http://www.w3.org/ns/prov#wasQuotedFrom	statmodel.com