About: http://webisa.webdatacommons.org/13809142

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	What we have in sense, according to Leibniz, is degree of firmness in contrast to degree of softness or fluidity.[1] Hardness is a notion related to firmness, and we can say in an approximate way, hardness occurs in nature.
http://www.w3.org/ns/prov#wasQuotedFrom	objectivistliving.com