About: http://webisa.webdatacommons.org/62589076

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	Yes, there is a problem ??? if I call the direction of motion the x-axis and the direction parallel to the yard lines the y-axis then these do not look perpendicular.
http://www.w3.org/ns/prov#wasQuotedFrom	scienceblogs.com