About: http://webisa.webdatacommons.org/128792817

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	Well, I do not know, I think maybe you need to ask in buddypress suport forums because the group fields feature is originally from buddypress, my plugin only adds new types of fields.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.org