About: http://webisa.webdatacommons.org/442919972

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	-- J. Burton., via e-mail First I tried taking substances such as vitamins, herbal extracts, supplements and smart drugs.
http://www.w3.org/ns/prov#wasQuotedFrom	improving-concentration.com