You are looking at the HTML representation of the mFormat?> format.
HTML is good for debugging, but probably is not suitable for your application.
Please see "format" parameter documentation at the API help for more information. 
<?xml version="1.0" encoding="utf-8"?>
<api>
  <query>
    <pages>
      <page pageid="1071" ns="10" title="Template:Stub" />
    </pages>
    <embeddedin>
      <ei pageid="942" ns="0" title="Cleveland Health Sciences Library" />
      <ei pageid="978" ns="0" title="School of Dental Medicine" />
      <ei pageid="979" ns="0" title="Case School of Engineering" />
      <ei pageid="1016" ns="0" title="Michael Yeager" />
      <ei pageid="1076" ns="0" title="Amasa Stone Chapel" />
      <ei pageid="1081" ns="0" title="Richard F. Celeste Biomedical Research Building" />
      <ei pageid="1082" ns="0" title="Bishop Building" />
      <ei pageid="1083" ns="0" title="Bolwell Health Center" />
      <ei pageid="1084" ns="0" title="Carlton Commons" />
      <ei pageid="1085" ns="0" title="Cedar Avenue Service Center" />
    </embeddedin>
  </query>
  <query-continue>
    <embeddedin eicontinue="10|Stub|1086" />
  </query-continue>
</api>