title: Setting up a plain graphene nested query
body: <p>I have successfully created an all graphene query that responds to </p>
  
  <pre><code>query {
      person (id: "Mary") {
          id
          name
      }
  }
  </code></pre>
  
  <p>I now want to extend this to be able to loop through all people and return similar data for each.</p>
  
  <pre><code>query {
      people {
          count
          allPersons {
             name
          }
      }
  }
  </code></pre>
  
  <p>How do I get the <code>resolve_allPersons</code> resolver in <code>people</code> to call the <code>person</code> resolver for each person?</p>