About: http://webisa.webdatacommons.org/456219404

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	A green roof often contains the following: a waterproofing layer, an insulation layer, a drainage barrier, a filter layer, planting medium, and various types of vegetation.
http://www.w3.org/ns/prov#wasQuotedFrom	dc.gov