About: http://webisa.webdatacommons.org/138638386

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	This page is a good check of understanding this and getting children to use these units of measurement.
http://www.w3.org/ns/prov#wasQuotedFrom	mathsblog.co.uk