About: http://webisa.webdatacommons.org/133975724

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	Nowadays, however, most prostate cancers are detected before they produce any symptoms by measuring the amount of a protein called the prostate-specific antigen (PSA) in the blood.
http://www.w3.org/ns/prov#wasQuotedFrom	pubmedcentralcanada.ca