About: http://webisa.webdatacommons.org/61679665

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	While matrices require data to be of a consistent type, a data.frame allows arbitrary types for each column.
http://www.w3.org/ns/prov#wasQuotedFrom	r-bloggers.com