About: http://webisa.webdatacommons.org/375466992

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	When a clot activator is added to the test tube in which blood is drawn, the sample can be centrifuged, leaving only serum at the top of the tube.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com