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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.
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<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="CCICCADA_Reconnect_2012.jpg" />
  </query-continue>
  <query>
    <pages>
      <page ns="6" title="File:BioNLP09.pdf" missing="" />
      <page pageid="26" ns="6" title="File:BURGERZZ.jpg" />
      <page pageid="59" ns="6" title="File:Beine-gpu.png" />
      <page pageid="885" ns="6" title="File:Berner REU 2021 Poster.png" />
      <page pageid="864" ns="6" title="File:BrennanAlternateSolutions.pdf" />
      <page pageid="865" ns="6" title="File:BrennanQuestions.pdf" />
      <page pageid="880" ns="6" title="File:BrennanResearchPoster.png" />
      <page pageid="859" ns="6" title="File:Brennan ResearchTopic Thought Maps.pdf" />
      <page pageid="71" ns="6" title="File:Brylow.png" />
      <page pageid="799" ns="6" title="File:Burkholder PosterPresentation Wiki.jpg" />
    </pages>
  </query>
</api>