About: http://webisa.webdatacommons.org/71401010

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	Yet another problem is that debris, such as grains of sand, small stones or metal may get stuck in or near the elements and cause scratching of the floor surface.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com