About: http://webisa.webdatacommons.org/22880738

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 system is a vehicle, so $x_1$ is distance and $x_2$ is velocity (or speed).
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com