zurb-foundation-5/doc/includes/form/examples_form_fieldset.html

Foundation 5 for npm (no code modification from original repo)

<form>
  <fieldset>
    <legend>Fieldset Legend</legend>

    <label>Input Label
      <input type="text" placeholder="Inputs and other form elements go inside...">
    </label>
  </fieldset>
</form>