GET request returning hierarchy of data

GETfood_blog_hierarchy.json

{
     "title":"Food",
     "articles":
     [
        {
            "url":"http://oursocialbloggingsite.com/api/articles/111",
            "title":"Why Food Is Delicious",
            "author":"Abe Adams"
        },
        {
            "url":"http://oursocialbloggingsite.com/api/articles/123",
            "title":"How to Find Food",
            "author":"Betty Black"
        }
     ]
}