About: http://webisa.webdatacommons.org/412812654

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	We also queried electronic hospital billing records to obtain demographic data, such as patient age, sex, race, and ethnicity, and services used, including diagnostic tests, therapies, and physician services.
http://www.w3.org/ns/prov#wasQuotedFrom	jamanetwork.com