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 version="0.2" query-continue-offset="0">
  <query>
    <_ERRC label="Has processing error" key="_ERRC" usageCount="0">
      <description en-CA="&amp;quot;Has processing error&amp;quot; is a predefined property provided by [https://www.semantic-mediawiki.org/wiki/Help:Special_properties Semantic MediaWiki] and represents errors that appeared in connection with improper value annotations or input processing." />
    </_ERRC>
    <_ERRT label="Has processing error text" key="_ERRT" usageCount="0">
      <description en-CA="&amp;quot;Has processing error text&amp;quot; is a predefined property containing a textual description of an error and is provided by [https://www.semantic-mediawiki.org/wiki/Help:Special_properties Semantic MediaWiki]." />
    </_ERRT>
    <Parent_Class label="Parent Class" key="Parent_Class" isUserDefined="" usageCount="11" description="" />
    <Parent_Division label="Parent Division" key="Parent_Division" isUserDefined="" usageCount="3" description="" />
    <Parent_Family label="Parent Family" key="Parent_Family" isUserDefined="" usageCount="279" description="" />
    <Parent_Genus label="Parent Genus" key="Parent_Genus" isUserDefined="" usageCount="8772" description="" />
    <Parent_Order label="Parent Order" key="Parent_Order" isUserDefined="" usageCount="61" description="" />
    <Parent_Species label="Parent Species" key="Parent_Species" isUserDefined="" usageCount="1275" description="" />
    <Parent_Subclass label="Parent Subclass" key="Parent_Subclass" isUserDefined="" usageCount="14" description="" />
    <Parent_Subdivision label="Parent Subdivision" key="Parent_Subdivision" isUserDefined="" usageCount="7" description="" />
    <Parent_Subfamily label="Parent Subfamily" key="Parent_Subfamily" isUserDefined="" usageCount="470" description="" />
    <Parent_Suborder label="Parent Suborder" key="Parent_Suborder" isUserDefined="" usageCount="34" description="" />
  </query>
  <meta limit="50" count="12" />
</api>