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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20091105111532" timestamp="2009-11-05T11:15:32Z" ns="0" title="Einstiegseite" />
        <page value="20091114224029" timestamp="2009-11-14T22:40:29Z" ns="0" title="Verein für Deutsche Kulturbeziehungen im Ausland" />
        <page value="20100301200055" timestamp="2010-03-01T20:00:55Z" ns="0" title="Clausen-Linie" />
        <page value="20100301200249" timestamp="2010-03-01T20:02:49Z" ns="0" title="Emil Nolde" />
        <page value="20100301200733" timestamp="2010-03-01T20:07:33Z" ns="0" title="Gabriele Beismann" />
        <page value="20100301201803" timestamp="2010-03-01T20:18:03Z" ns="0" title="Herzogtum Schleswig" />
        <page value="20100301201956" timestamp="2010-03-01T20:19:56Z" ns="0" title="Hjalmar Schacht" />
        <page value="20100301203449" timestamp="2010-03-01T20:34:49Z" ns="0" title="Johannes Tiedje" />
        <page value="20100301204649" timestamp="2010-03-01T20:46:49Z" ns="0" title="Norbert Spahn" />
        <page value="20100301205124" timestamp="2010-03-01T20:51:24Z" ns="0" title="Schleswig-Holstein-Sonderburg-Augustenburg" />
      </results>
    </querypage>
  </query>
</api>