About: http://webisa.webdatacommons.org/149934287

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	column-form addition and subtraction, including subtraction with or without regrouping
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com