About: http://webisa.webdatacommons.org/442655849

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	period from the late 1980s to 2008, there were an average of only 2.8
http://www.w3.org/ns/prov#wasQuotedFrom	biomedsearch.com