CSS display-table + SPAN error

CSS display-table + SPAN error

I have this example: Fiddle link
A table using display: table, display: table-cell, display: table-row
I need add before <p> a <span> tag, but my table structure breaks.
Any idea? Thanks
Example:
<fieldset>
<span>
<p>
<label>First Name: </label>
<input type="text" />
</p>
</span>
<span>
<p>
<label>Second Name: </label>
<input type="text" />
</p>
</span>
<span>
<p>
<label>Country: </label>
<select>
<option>Choose</option>
</select>
</p>
</span>
<span>
<p>
<label>Age: </label>
<select>
<option>Choose</option>
</select>
</p>
</span>
</fieldset>