About: http://webisa.webdatacommons.org/318938896

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	by ethnicity, socioeconomic status, sex, or other demographic variables.
http://www.w3.org/ns/prov#wasQuotedFrom	biomedcentral.com