title: Fetching a list of books adapted into films from dbpedia
body: <p>I am trying to fetch a list of American movies adapted from books from dbpedia. This is what I have so far:</p>
  
  <pre><code>PREFIX onto: &lt;http://dbpedia.org/ontology/&gt;
  PREFIX dcterms: &lt;http://purl.org/dc/terms/&gt;
  
  SELECT * WHERE {
  
  ?movie dcterms:subject &lt;http://dbpedia.org/resource/Category:American_films&gt; .
  ?movie dcterms:subject &lt;http://dbpedia.org/resource/Category:Films_based_on_novels&gt; .
  ?movie onto:basedOn ?book .
  ?book a onto:Book .
  }
  </code></pre>
  
  <p>I get only 4 results back. Is there another property I can use to get more results?</p>