About: http://webisa.webdatacommons.org/83716813

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	Also, Dr. Clayton Dean of the Maryland spine Center says replacing a mattress every five to nine years is a great idea, especially for those who wake up with back stiffness or pain.
http://www.w3.org/ns/prov#wasQuotedFrom	furninfo.com