hasMemberAudience is probably obsolete

[JuergenGrupp]

hasMemberAudience is declared to point to a member of an audience, but is not used in any of the classes. It may be obsolete?
I would rather express the fact that a person is a member of an audience by a property like belongsToAudience pointing from a Consumer to an Audience.
Another option would be to use the property isMemberOf, but this would require the inverse property hasMember to be a property of an Audience and I don't think the Audience should have knowledge about individual members.
Proposal: Delete hasMemberAudience. Comments are welcome!