public string Start(int id)
    {
        IRace race = this.raceById[id];

        if (race.Participants.Count == 0)
        {
            return(NoParticipantsMessage);
        }

        if (race.IsOver)
        {
            return(string.Empty);
        }

        StringBuilder result = new StringBuilder();

        result.AppendLine($"{race.Route} - {race.Length}");
        result.Append(string.Join(Environment.NewLine, race.GetWinnersInfo()));

        return(result.ToString());
    }