(c++11) reading a file while simultaneously saving each each word in the file to a given vector

Question

So to start off, the goal of this function below is to read each line in the text file (TitanData.txt). Each line has 3 pieces of information: Age, Passenger Class, and if the passenger survived (saved as "TRUE" or "FALSE") in order. I've created 3 vectors: vector Age, vector PassengerClass, vector Survived. The issue seems to be that the push_back functions aren't working properly. I've been looking for solutions for hours and I have yet to come across one so hopefully I can get an answer here.

The function is below:

void ReadFromFile(vector<int> Age, vector<string> PassengerClass, vector<bool> Survived)
{
    bool survived;
    int age;
    string Passenger_Class;

    string val1, val2, val3;
    ifstream infile;
    infile.open("TitanicData.txt");
    if (infile)
    {
        while (infile >> val1 >> val2 >> val3)
        {
            age = stoi(val1);
            Age.push_back(age);


            Passenger_Class = val2;
            PassengerClass.push_back(val2);


            if (val3 == "TRUE")
            {
                survived = true;
                Survived.push_back(true);
            }
            if (val3 == "FALSE")
            {
                survived = false;
                Survived.push_back(false);
            }
        }
        infile.close();
    }
}