About: http://webisa.webdatacommons.org/99993981

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	Matrices are very messy, especially if you are doing them by hand, and notes can make it easier to check your work later.
http://www.w3.org/ns/prov#wasQuotedFrom	purplemath.com