>>> sorted(list(Tag.objects.usage_for_model(Title)), key=lambda a: a.name)
[<Tag: Appraisals>, <Tag: Change>, <Tag: Coaching>, <Tag: Communication>, <Tag: Competencies>, <Tag: Feedback skills>, <Tag: First line management>, <Tag: Interviewing>, <Tag: Leadership>, <Tag: Managing people>, <Tag: Objective setting>, <Tag: Performance management>, <Tag: Personal development>, <Tag: Selection interviewing>, <Tag: absenteeism>, <Tag: attendance>]