About: http://webisa.webdatacommons.org/352683131

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 am assume this calculate method is a part of your GUI class and is called when a button is clicked?
http://www.w3.org/ns/prov#wasQuotedFrom	devx.com