About: http://webisa.webdatacommons.org/183772482

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	is.matrix returns TRUE if x is a vector and has a dim attribute of length 2) and FALSE otherwise.
http://www.w3.org/ns/prov#wasQuotedFrom	inside-r.org