About: http://webisa.webdatacommons.org/337850030

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	Often, sand is combined with clay and gravel or other materials to improve its drainage or prevent too much compaction.
http://www.w3.org/ns/prov#wasQuotedFrom	dot.gov