public void Execute(IDataBase db)
        {
            var positions = new[]
            {
                "Плотник",
                "Программист"
            };

            foreach (var position in positions)
            {
                db.InsertPosition(position);
            }

            var peoples = new[]
            {
                new People("Иванов Иван", positions[0]),
                new People("Петров Петр", positions[0]),
                new People("Князь Владимир", positions[1]),
                new People("Клинт Бартон", positions[1]),
            };

            var groups = new[]
            {
                new Group("Карлики"),
                new Group("Забегаловка")
            };

            groups[0].SetPeoples(new[] { peoples[0], peoples[2] });
            groups[1].SetPeoples(new[] { peoples[1], peoples[3] });

            foreach (var group in groups)
            {
                db.ExecuteCommand(Parameters.Insert, group);
            }
        }