About: http://webisa.webdatacommons.org/315469225

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	Generally, after several years, mattresses begin to lose their ???spring??? and, for some people, that can trigger back problems and other aches and pains as well as reducing the quality of sleep.
http://www.w3.org/ns/prov#wasQuotedFrom	thesimpledollar.com