About: http://webisa.webdatacommons.org/211297748

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	BACKGROUND OF THE INVENTION There exist many mechanisms for tightening shoes, boots, skates, and other footwear.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com