JSON question

function people_profile() {
    $print = "gorilla test";
    $fileName = "/opt/lampp/htdocs/wordpress/wp-content/themes/black-green/bios.json";
    $people = json_decode(file_get_contents($fileName));

    //If I don't have nested objects, then this works:
    //$print .= $people->name;
    //When I do have nested objects, I can't just string pointers like this:
    $print .= $people->Person->name;
    //So, how do I get the desired effect?

    return $print;
}

bios.json:
{ "Person": {
"name":"Nathan"}}