About: http://webisa.webdatacommons.org/175181209

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	I calculate the square feet, and multiply by a difficulty factor, depending on obstacles, hills, and other obstacles.
http://www.w3.org/ns/prov#wasQuotedFrom	lawnsite.com