an Entity references as follows:
Genitive case signals that the referent of the marked noun is the possessor of the referent of another noun, e.g. "the man's foot". In some languages, genitive case may express an associative relation between the marked noun and another noun. (http://www.sil.org/linguistics/glossaryoflinguisticterms/WhatIsGenitiveCase.htm 17.11.06)