name="el-dt" data-expectedrole="term" class="ex">x</dt>
  <dd>x</dd>
</dl>

<em data-testname="el-em" data-expectedrole="emphasis" class="ex">x</em>
<!-- todo: embed -->
<fieldset data-testname="el-fieldset" data-expectedrole="group" class="ex"><legend>x</legend><input></fieldset>
<!-- todo: figcaption -->
<figure data-testname="el-figure" data-expectedrole="figure" class="ex"><img alt="x" src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="><figcaption>x</figcaption></fi