Cannot parse a downloaded xml file to XDocument in Windows Phone 8 app

I am creating a windows phone 8 app. In it I am downloading a xml file from a url using WebClient. The downloaded result shows something like this:

[{"PersonNo":"1","PersonName":"Kaustav","Address":"Kolkata"},{"PersonNo":"2","PersonName":"Jay","Address":"Mumbai"}

{"PersonNo":"3","PersonName":"Rants","Address":"Chennai"}]

When I passes this to the Parse method of XDocument it generates an exception:

An exception of type 'System.Xml.XmlException' occurred in System.Xml.ni.dll but was not handled in user code. Additional information: Data at the root level is invalid. Line 1, position 1.

My code is:

private void getPersons()
{

    WebClient wc = new WebClient();
    wc.DownloadStringCompleted += HttpCompleted;
    wc.DownloadStringAsync(new Uri("http://ift.tt/1oUmxIn")); 
}
private void HttpCompleted(object sender, DownloadStringCompletedEventArgs e)
{
    var loadedData = XDocument.Parse(e.Result); //problem in this line

    //display person info
}

Here the url is changed for security reasons. So how to parse this downloaded xml file to XDocument?