Problem with the sample html page

[airosa]

h3 tag is not matched

<div class="row">
    <div class="col-md-6">
      <h3>SDMX-ML Response</h2>
    </div>
    <div class="col-md-6">
      <h3>SDMX-JSON Response</h3>
    </div>
  </div>