About: http://webisa.webdatacommons.org/426504047

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	While positioned over siderails 282, base 542 is substantially horizontal providing a surface for placing various items such as food trays, beverage containers, books, or other items.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com