About: http://webisa.webdatacommons.org/212479172

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	removed is not satisfactory for any reason, gravel or other fill can be used to refill the cavity.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com