About: http://webisa.webdatacommons.org/192234134

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	To really work out what is going on you need to take your system, i.e. the bar, and apply the Lorentz transforms to calculate exactly how it looks in your frame.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com