How do I retreive blog posts with a specific label?

I am using Javascript code made available by Brett Morgan to retreive posts 
from my Blogger blog.

I think what I want to do is simple, but after a lot of searching, I can't 
seem to get a clear answer. I just want to filter the posts by a label, so 
that I only download posts where 'label = XYZ'.

How can I do that, using the following code?

Thank you for any help.


function init() {
    // Get your API key from http://code.google.com/apis/console
    gapi.client.setApiKey('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
    // Load the Blogger JSON API
    gapi.client.load('blogger', 'v3', function() {
        // Load the list of posts for code.blogger.com
        var request = gapi.client.blogger.posts.list({
            'blogId': 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
            'fields': 'items(content,title,updated,id,labels)',
            'fetchBodies': true
        });
        request.execute(function(response) {

            var blogger = document.getElementById("blogger");
            var anchor = 0;
            for (var i = 0; i < response.items.length; i++)
            {
                var bloggerDiv = document.createElement("div");
                bloggerDiv.id = "blogger-" + i;
                bloggerDiv.className = "bloggerItem";

                // For the parts of the response, have a look at the result 
at:
                // 
http://code.google.com/apis/explorer/#_s=blogger&_v=v2&_m=posts.list&blogId=xxxxxxxxxxxxx
                $(bloggerDiv).append("<h2>" + response.items[i].title + 
"</h2>");
                var date = response.items[i].updated;
                date = date.replace("T", " ");
                date = date.replace("+03:00", "");
                var printDate = new moment(date);
                $(bloggerDiv).append("<p><span class='byline'>" + 
printDate.format('dddd, MMMM Do YYYY, h:mm:ss a') + "</span></p>");
                $(bloggerDiv).append(response.items[i].content);

// This logic might be useful to keep around if I decide to do
// something different based on whether or not the last item
// needs different formatting in some way.
//        if (i+1<response.items.length) {
//          $(bloggerDiv).append("<hr>");
//        }
//        $(bloggerDiv).append("<hr>");


                bloggerAnchor = document.createElement("a");

                bloggerAnchor.name = "blogger-" + response.items[i].id;

                blogger.appendChild(bloggerAnchor);
                blogger.appendChild(bloggerDiv);

                anchor = anchor + 1;

            }
            // find out which anchor the user wanted...
            var hashVal = window.location.hash.substr(1);
// ... then jump to that position:
            location.hash = "#" + hashVal;
        });
    });
}

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