private Keyword GetKeyword(Keyword g)
        {
            var keyword = _entities.Keywords.Where(o => o.Code == g.Code).FirstOrDefault();

            if (keyword == null)
            {
                keyword = new Keyword {
                    Name = g.Name, Code = g.Code
                };
                _entities.AddToKeywords(keyword);
                _entities.SaveChanges();
            }
            return(keyword);
        }