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="20140106104645" timestamp="2014-01-06T10:46:45Z" ns="0" title="Ελληνική Βιομηχανία Οχημάτων" />
        <page value="20140106155115" timestamp="2014-01-06T15:51:15Z" ns="0" title="ALCo RSD-34" />
        <page value="20140106155626" timestamp="2014-01-06T15:56:26Z" ns="0" title="ALCo DL537" />
        <page value="20140106160705" timestamp="2014-01-06T16:07:05Z" ns="0" title="Alsthom CC-AD2400C1" />
        <page value="20140106163113" timestamp="2014-01-06T16:31:13Z" ns="0" title="Αστικές Συγκοινωνίες Αθηνών" />
        <page value="20140106181836" timestamp="2014-01-06T18:18:36Z" ns="0" title="Οργανισμός Αστικών Συγκοινωνιών Αθηνών" />
        <page value="20140107155910" timestamp="2014-01-07T15:59:10Z" ns="0" title="501" />
        <page value="20140107155918" timestamp="2014-01-07T15:59:18Z" ns="0" title="527" />
        <page value="20140107155932" timestamp="2014-01-07T15:59:32Z" ns="0" title="Ε14" />
        <page value="20140107160945" timestamp="2014-01-07T16:09:45Z" ns="0" title="Α8" />
      </results>
    </querypage>
  </query>
</api>