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="20141017082703" timestamp="2014-10-17T08:27:03Z" ns="0" title="新規ページ作成方法" />
        <page value="20141017082730" timestamp="2014-10-17T08:27:30Z" ns="0" title="メインページ" />
        <page value="20150221112524" timestamp="2015-02-21T11:25:24Z" ns="0" title="ワシペディア" />
        <page value="20170709031145" timestamp="2017-07-09T03:11:45Z" ns="0" title="Advantages of Loft Conversion Services8188420" />
        <page value="20170712070708" timestamp="2017-07-12T07:07:08Z" ns="0" title="On-line Poker Technique9689584" />
        <page value="20170712070745" timestamp="2017-07-12T07:07:45Z" ns="0" title="On-line Poker Strategy9007681" />
        <page value="20170712070907" timestamp="2017-07-12T07:09:07Z" ns="0" title="On-line Poker Technique2574083" />
        <page value="20170712071004" timestamp="2017-07-12T07:10:04Z" ns="0" title="On-line Poker Strategy6814097" />
        <page value="20170712071349" timestamp="2017-07-12T07:13:49Z" ns="0" title="On-line Poker Technique6627942" />
        <page value="20170712071426" timestamp="2017-07-12T07:14:26Z" ns="0" title="On-line Poker Technique4866244" />
      </results>
    </querypage>
  </query>
</api>