Structure unbinding in C++ for vector of vector string?

Question

Does structure unbinding doesn't work for vector of vector in string? Like in Python or javascript, it is easier to unpack them. Is that not possible in C++ 17 yet? Here is my code, when I am trying to unpack the two values from the array, it throws me an error. Here is the entire code.

string tournamentWinner(vector<vector<string>> competitions,
                        vector<int> results)
{

   string best_Team = "";
   map<string, int> scores = {{best_Team, 0}};

    for(int idx = 0; idx < competitions.size(); idx ++)
    {
        auto competition = competitions[idx];
        
        auto [homeTeam, awayTeam] = competition;
        //auto homeTeam = competition[0];
        //auto awayTeam = competition[1];
        auto result = results[idx];

        string winningTeam = result == 1 ? homeTeam : awayTeam;

        //updateScores(winningTeam, 3, scores);

        if( scores[winningTeam] > scores[best_Team] )
        {
            best_Team = winningTeam;
        }

    }
    return best_Team;
}

int main()
{
    vector<vector<string>> competitions{{"HTML", "C#"}, {"C#", "Python"}, {"Python", "C#"}};
    vector<int> results{0, 0, 1};
    string winner = tournamentWinner(competitions, results);
    cout << winner.c_str();
    return 0;
}

Here is the compilation error -

 In function 'std::string tournamentWinner(std::vector<std::vector<std::__cxx11::basic_string<char> > >, std::vector<int>)':
tournament_winner_simple.cpp:28:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   28 |         auto [homeTeam, awayTeam] = competition;
      |              ^
tournament_winner_simple.cpp:28:14: error: 2 names provided for structured binding
   28 |         auto [homeTeam, awayTeam] = competition;