"applicants": [
        {
            "age": 58,
            "city": "Vallda",
            "id": "1002406-1",
            "mainapplicant": true
        },
        {
            "age": 59,
            "city": "Vallda",
            "id": "1002406-2",
            "mainapplicant": false
        }
    ],
    "groupnbr": 120,
    "rate": 0.041
}

I want to to use the field *city* from the first element in the *applicants* array.  e.g.  application.applicants.get(0).city