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="0">
  <query>
    <results>
      <Main_Page fulltext="Main Page" fullurl="https://subwiki.org/wiki/Main_Page">
        <printouts>
          <Modification_date>
            <value>1546436893</value>
          </Modification_date>
        </printouts>
      </Main_Page>
      <Ref:Copyrights fulltext="Ref:Copyrights" fullurl="https://subwiki.org/wiki/Ref:Copyrights">
        <printouts>
          <Modification_date>
            <value>1489817417</value>
          </Modification_date>
        </printouts>
      </Ref:Copyrights>
      <Peirce's_law fulltext="Peirce&#039;s law" fullurl="https://subwiki.org/wiki/Peirce%27s_law">
        <printouts>
          <Modification_date>
            <value>1447863254</value>
          </Modification_date>
        </printouts>
      </Peirce's_law>
      <Logic_Live fulltext="Logic Live" fullurl="https://subwiki.org/wiki/Logic_Live">
        <printouts>
          <Modification_date>
            <value>1447774519</value>
          </Modification_date>
        </printouts>
      </Logic_Live>
      <Inquiry_Live fulltext="Inquiry Live" fullurl="https://subwiki.org/wiki/Inquiry_Live">
        <printouts>
          <Modification_date>
            <value>1447774132</value>
          </Modification_date>
        </printouts>
      </Inquiry_Live>
      <Truth_theory fulltext="Truth theory" fullurl="https://subwiki.org/wiki/Truth_theory">
        <printouts>
          <Modification_date>
            <value>1447771828</value>
          </Modification_date>
        </printouts>
      </Truth_theory>
      <Pragmatic_maxim fulltext="Pragmatic maxim" fullurl="https://subwiki.org/wiki/Pragmatic_maxim">
        <printouts>
          <Modification_date>
            <value>1447734925</value>
          </Modification_date>
        </printouts>
      </Pragmatic_maxim>
      <Normative_science fulltext="Normative science" fullurl="https://subwiki.org/wiki/Normative_science">
        <printouts>
          <Modification_date>
            <value>1447713882</value>
          </Modification_date>
        </printouts>
      </Normative_science>
      <Descriptive_science fulltext="Descriptive science" fullurl="https://subwiki.org/wiki/Descriptive_science">
        <printouts>
          <Modification_date>
            <value>1447710964</value>
          </Modification_date>
        </printouts>
      </Descriptive_science>
      <Triadic_relation fulltext="Triadic relation" fullurl="https://subwiki.org/wiki/Triadic_relation">
        <printouts>
          <Modification_date>
            <value>1447709138</value>
          </Modification_date>
        </printouts>
      </Triadic_relation>
      <Relation_theory fulltext="Relation theory" fullurl="https://subwiki.org/wiki/Relation_theory">
        <printouts>
          <Modification_date>
            <value>1447707904</value>
          </Modification_date>
        </printouts>
      </Relation_theory>
      <Relative_term fulltext="Relative term" fullurl="https://subwiki.org/wiki/Relative_term">
        <printouts>
          <Modification_date>
            <value>1447705324</value>
          </Modification_date>
        </printouts>
      </Relative_term>
      <Logic_of_information fulltext="Logic of information" fullurl="https://subwiki.org/wiki/Logic_of_information">
        <printouts>
          <Modification_date>
            <value>1447644394</value>
          </Modification_date>
        </printouts>
      </Logic_of_information>
      <Dynamics_of_inquiry fulltext="Dynamics of inquiry" fullurl="https://subwiki.org/wiki/Dynamics_of_inquiry">
        <printouts>
          <Modification_date>
            <value>1447633699</value>
          </Modification_date>
        </printouts>
      </Dynamics_of_inquiry>
      <Inquiry fulltext="Inquiry" fullurl="https://subwiki.org/wiki/Inquiry">
        <printouts>
          <Modification_date>
            <value>1447626971</value>
          </Modification_date>
        </printouts>
      </Inquiry>
      <Sign_relation fulltext="Sign relation" fullurl="https://subwiki.org/wiki/Sign_relation">
        <printouts>
          <Modification_date>
            <value>1447623304</value>
          </Modification_date>
        </printouts>
      </Sign_relation>
      <Relation_reduction fulltext="Relation reduction" fullurl="https://subwiki.org/wiki/Relation_reduction">
        <printouts>
          <Modification_date>
            <value>1447558560</value>
          </Modification_date>
        </printouts>
      </Relation_reduction>
      <Relation_construction fulltext="Relation construction" fullurl="https://subwiki.org/wiki/Relation_construction">
        <printouts>
          <Modification_date>
            <value>1447529043</value>
          </Modification_date>
        </printouts>
      </Relation_construction>
      <Relation_composition fulltext="Relation composition" fullurl="https://subwiki.org/wiki/Relation_composition">
        <printouts>
          <Modification_date>
            <value>1447525121</value>
          </Modification_date>
        </printouts>
      </Relation_composition>
      <Relation_(mathematics) fulltext="Relation (mathematics)" fullurl="https://subwiki.org/wiki/Relation_(mathematics)">
        <printouts>
          <Modification_date>
            <value>1447521044</value>
          </Modification_date>
        </printouts>
      </Relation_(mathematics)>
    </results>
    <printrequests>
      <printrequest label="" typeid="_wpg" mode="2" />
      <printrequest label="Modification date" typeid="_dat" mode="1" />
    </printrequests>
  </query>
</api>