About: http://webisa.webdatacommons.org/12986274

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	Data sources We searched 19 databases including PubMed, EMBASE and The Cochrane Library, covering the full range of publication years from inception to December 2010.
http://www.w3.org/ns/prov#wasQuotedFrom	science.gov