About: http://webisa.webdatacommons.org/353166258

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	In America, moving the hand or lamp up and down vertically is a signal to proceed; moving them across the track is a signal to stop; moving them in a circle is a signal to back.
http://www.w3.org/ns/prov#wasQuotedFrom	du.edu