About: http://webisa.webdatacommons.org/357867200

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	Selenium is an essential element but is toxic at surprisingly low doses; as a trace element, adults only need about 55 micrograms per day (abbreviated mcg or ??g).
http://www.w3.org/ns/prov#wasQuotedFrom	scienceblogs.com