About: http://webisa.webdatacommons.org/101707981

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	However, for some elements such as arsenic, these selective extraction techniques are ineffective.
http://www.w3.org/ns/prov#wasQuotedFrom	usda.gov