"Role_Has_Parent"^^ . "A3"^^ . . . "Role Has Parent"^^ . "Role_Has_ParentPTNCI" . "For an NCI Thesaurus role this association specifies that the role exists as part of a role hierarchy and specifies the role's parent, the role that this role specializes.NCI" . "Role_Has_Parent"^^ . "Conceptual Entity"^^ .