What's the AngularJS equivalent of a HandlebarsJS "with" block?

In HandlebarsJS you can change the scope to a child property of the current scope using a "with" block. How can I do that in AngularJS?

{
  title: "My first post!",
  author: {
    firstName: "Charles",
    lastName: "Jolley"
  }
}

just do

<span>{{author.firstname}}

{{author.lastName}}</span>

AngularJS doesnt care how much your datas are nested.