About: http://webisa.webdatacommons.org/339572034

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	As a person ages, the bone marrow at the center of long bones is slowly converted to yellow bone marrow, made mostly of fat cells, which does not synthesize blood cells.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeekhealth.com