About: http://webisa.webdatacommons.org/357576390

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	So, for example to sum the column, you can sum (A1*B1) of each row adding a column (hidden or not) with A*B and sum it.
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com