About: http://webisa.webdatacommons.org/58807896

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	Somewhere, per mile, of 3-10x as high as for cars (but I think including children?
http://www.w3.org/ns/prov#wasQuotedFrom	getrichslowly.org