About: http://webisa.webdatacommons.org/120927769

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	It is often thought to result from wear and tear on a joint, although there are other causes, such as congenital defects, trauma, and metabolic disorders.
http://www.w3.org/ns/prov#wasQuotedFrom	nytimes.com