About: http://webisa.webdatacommons.org/338421054

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	The frame can take various forms, but typically provides a pair of tubular side frames 12 a, 12 b that are cross-connected in some manner such as illustrated in FIG. 1.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com