About: http://webisa.webdatacommons.org/251015355

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	A comfortable width is usually 4???, but depending on the topography, trees, or other site conditions, a wider or narrower step may be desired.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net