About: http://webisa.webdatacommons.org/237097825

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	said base including at least one chamber and having a fill port for providing access to said at least one chamber for filling said at least one chamber with a flowable ballast material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com