About: http://webisa.webdatacommons.org/152324958

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	Just as an informative, cement is the hardest surface to run on, followed by asphalt, then progressing from hardpack dirt on up the scale.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com