How to retrieve data from json in compoundjs controller

hi I am new to compound Js.

In compound js, I am retrieving data from back end as data was in json format.

In my controller I wrote code to retrieve data by passing id like this-

action(function teamforsportsid(req, res){

return Team.find(req.params.id, function(err, team){

    if(!err) {

        return send(team[0]["_id"]);

    }else {
        return console.log(err);
    }
 });

});

In this team[0]["_id"] I got particular id.

In place of team[0]["_id"], I used team[0]["first_name"] and I didnt get the name...

My json will be like this...

[
{
"_id": "510b51ff6ee1f5ab2800001f",

"first_name": "Pittsburgh"} ]

Is there any other way to retrieve data in controller?

Use this-

action(function teamforsportsid(req, res){

return Team.find(req.params.id, req.params.first_name, function(err, team){

    if(!err) {

        return send(team[0]["_id"], team[0]["first_name"]);

    }else {
        return console.log(err);
    }
 });

});