About: http://webisa.webdatacommons.org/402601807

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 number of elements, such as zinc, are required within the diet, while some elements are toxic to humans, for example arsenic.
http://www.w3.org/ns/prov#wasQuotedFrom	usda.gov