About: http://webisa.webdatacommons.org/165415572

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	Nineteen studies were conducted in the United States and the remaining studies were conducted mainly in Europe, with Spain, Sweden, and Greece heavily represented.
http://www.w3.org/ns/prov#wasQuotedFrom	nel.gov