About: http://webisa.webdatacommons.org/438238163

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	Ontop of this cover place stone, bricks or other weights??????use flint or granite; avoid the use of limestone,sandstone or marble.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net