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="Equal_Pay_Day" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="274" ns="0" title="Berechnung des Equal Pay Day" />
      <p pageid="18" ns="0" title="Bereinigter Gender Pay Gap" />
      <p pageid="20" ns="0" title="Bildung" />
      <p pageid="298" ns="0" title="Case Law in the USA, Canada and UK" />
      <p pageid="281" ns="0" title="Certification of Equal Pay" />
      <p pageid="252" ns="0" title="Die Entgeltlücke wird im Hochlohnbereich geschlossen" />
      <p pageid="329" ns="0" title="Digitalisierung" />
      <p pageid="305" ns="0" title="EPD 2017: 10 Jahre Equal Pay Day in Deutschland" />
      <p pageid="146" ns="0" title="EPD Mediathek" />
      <p pageid="364" ns="0" title="Entgeltgleichheitcheck" />
    </allpages>
  </query>
</api>