About: http://webisa.webdatacommons.org/39650807

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	Retaining walls can be built using materials such as wood, stone, interlocking blocks, bricks, or poured concrete.
http://www.w3.org/ns/prov#wasQuotedFrom	costowl.com