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="20150731125123" timestamp="2015-07-31T12:51:23Z" ns="0" title="Lorena perez" />
        <page value="20150731130948" timestamp="2015-07-31T13:09:48Z" ns="0" title="Marcia Salgado" />
        <page value="20150806174744" timestamp="2015-08-06T17:47:44Z" ns="0" title="Jpg" />
        <page value="20150814155737" timestamp="2015-08-14T15:57:37Z" ns="0" title="Donde estamos" />
        <page value="20150827160213" timestamp="2015-08-27T16:02:13Z" ns="0" title="Cuánto pesa mi cilindro" />
        <page value="20150827160451" timestamp="2015-08-27T16:04:51Z" ns="0" title="Servicio de asistencia técnica" />
        <page value="20150827182454" timestamp="2015-08-27T18:24:54Z" ns="0" title="Tipificación de llamadas" />
        <page value="20150827182857" timestamp="2015-08-27T18:28:57Z" ns="0" title="¿Qué es STP?" />
        <page value="20150827183915" timestamp="2015-08-27T18:39:15Z" ns="0" title="Ingreso al sistema" />
        <page value="20150901192522" timestamp="2015-09-01T19:25:22Z" ns="0" title="Innovación" />
      </results>
    </querypage>
  </query>
</api>