About: http://webisa.webdatacommons.org/31200314

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	Marble is a soft stone, softer than granite and is is absorbent, which can cause the staining.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.jp