About: http://webisa.webdatacommons.org/82863026

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	my question is how to ignore a field for example 'f2', in the table mapped to B?
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com