You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="B156058.jpg|2396" />
  </query-continue>
  <query>
    <pages>
      <page pageid="569" ns="0" title="Olga Knudsen" />
      <page pageid="2370" ns="0" title="Albuen" />
      <page pageid="2421" ns="0" title="Dronningebakken" />
      <page pageid="2451" ns="0" title="Svend Aage Thomsen" />
      <page pageid="2478" ns="0" title="Kirsten Mikkelsen" />
      <page pageid="2482" ns="0" title="Leif Skov" />
      <page pageid="2656" ns="0" title="Vejle Amts Rekylkorps 1911-1919" />
      <page pageid="2674" ns="0" title="Kælkning i Roms Hule" />
      <page pageid="2736" ns="0" title="Gæstgiverske Anne Marie Bertelsen" />
      <page pageid="2870" ns="0" title="Skovkroen" />
    </pages>
  </query>
</api>