About: http://webisa.webdatacommons.org/409552720

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 bearing allows the arm to be pivoted with respect to the tree or other device without any scraping or other sound that might result from metal grinding on metal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com