About: http://webisa.webdatacommons.org/319178428

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	Subsurface drainage system means any pipe with or without a layer of gravel, stone, or coarse sand, placed below the surface of the ground and designed or constructed in such a manner as to:
http://www.w3.org/ns/prov#wasQuotedFrom	in.gov