About: http://webisa.webdatacommons.org/17115841

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	CA 19-9 is a substance released into the blood by both cancer cells and normal cells.
http://www.w3.org/ns/prov#wasQuotedFrom	cancer.gov