You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20070406045205" timestamp="2007-04-06T04:52:05Z" ns="0" title="JC キン肉マン 第12巻" />
        <page value="20070406075719" timestamp="2007-04-06T07:57:19Z" ns="0" title="JC キン肉マン 第11巻" />
        <page value="20070406122753" timestamp="2007-04-06T12:27:53Z" ns="0" title="一発勝負!!の巻" />
        <page value="20070406205522" timestamp="2007-04-06T20:55:22Z" ns="0" title="役者がそろった!!の巻" />
        <page value="20070411094229" timestamp="2007-04-11T09:42:29Z" ns="0" title="JC キン肉マン 第13巻" />
        <page value="20071011025410" timestamp="2007-10-11T02:54:10Z" ns="0" title="マッスル・ブラザーズ" />
        <page value="20071011050324" timestamp="2007-10-11T05:03:24Z" ns="0" title="ニュー・マシンガンズ" />
        <page value="20071012170604" timestamp="2007-10-12T17:06:04Z" ns="0" title="キン骨マン" />
        <page value="20071012191133" timestamp="2007-10-12T19:11:33Z" ns="0" title="プリンス・カメハメ" />
        <page value="20071014070006" timestamp="2007-10-14T07:00:06Z" ns="0" title="バラクーダ" />
      </results>
    </querypage>
  </query>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
</api>