<http://webisa.webdatacommons.org/prov/454987700> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/52097591> . <http://webisa.webdatacommons.org/52097591> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> . <http://webisa.webdatacommons.org/52097591> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/454891409> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/52097591> . <http://webisa.webdatacommons.org/52097591> <http://www.w3.org/ns/prov#value> "The filling material can include sand, crushed rock or other materials." .