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 apcontinue="BERENGUER_HERNÁNDEZ,_JORGE" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="5062" ns="0" title="B17 Vitamin Supplements And Enzymes" />
      <p pageid="54660" ns="0" title="BARBOSA CRUZ, DANIELA" />
      <p pageid="3242" ns="0" title="BAUTISTA MONTOYA,DAVID" />
      <p pageid="3674" ns="0" title="BAÑOS PÉREZ, JOSÉ ANTONIO" />
      <p pageid="3723" ns="0" title="BAÑÓN FUSTER, FERNANDO" />
      <p pageid="27729" ns="0" title="BBC Announces It Will Continue To Broadcast Wimbledon Until 2027" />
      <p pageid="36452" ns="0" title="BBC Bitcoin Mining Report Used In Crypto-Rip-off" />
      <p pageid="2984" ns="0" title="BELMONTE BUESO, JOSÉ LUIS" />
      <p pageid="52201" ns="0" title="BELTRÁN POVEDA, ALEJANDRO" />
      <p pageid="3289" ns="0" title="BERDONCES DÍAZ,ISABEL" />
    </allpages>
  </query>
</api>