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>
    <allpages gapcontinue="Kannst_Du_mir_einen_Satz_nennen?" />
  </query-continue>
  <query>
    <pages>
      <page pageid="5162" ns="0" title="Kalender">
        <flagged stable_revid="16545" level="0" level_text="stable" />
      </page>
      <page pageid="2885" ns="0" title="Kamel im Halteverbot">
        <flagged stable_revid="7743" level="1" level_text="quality" />
      </page>
      <page pageid="3474" ns="0" title="Kamel vor einer Pyramide">
        <flagged stable_revid="7744" level="1" level_text="quality" />
      </page>
      <page pageid="2886" ns="0" title="Kamelkamm">
        <flagged stable_revid="7745" level="1" level_text="quality" />
      </page>
      <page pageid="5773" ns="0" title="Kampfchillen">
        <flagged stable_revid="22270" level="0" level_text="stable" />
      </page>
      <page pageid="1771" ns="0" title="Kampftrinken">
        <flagged stable_revid="311951" level="0" level_text="stable" />
      </page>
      <page pageid="5537" ns="0" title="Kanister füllen">
        <flagged stable_revid="21565" level="0" level_text="stable" />
      </page>
      <page pageid="6191" ns="0" title="Kann ein Mensch die Schwester seiner Witwe heiraten">
        <flagged stable_revid="23428" level="0" level_text="stable" />
      </page>
      <page pageid="3694" ns="0" title="Kann ein Mensch die Schwester seiner Witwe heiraten?">
        <flagged stable_revid="43709" level="0" level_text="stable" />
      </page>
      <page pageid="3516" ns="0" title="Kannibalismus auf der Eisenbahn">
        <flagged stable_revid="27271" level="0" level_text="stable" />
      </page>
    </pages>
  </query>
</api>