<input name="organizer.name" ng:required>
<input name="organizer.surname" ng:required>
<input name="organizer.inst" >
<input name="organizer.email" ng:required>
</div>
<input name="organizer.name" ng:required>
<input name="organizer.surname" ng:required>
<input name="organizer.inst" >
<input name="organizer.email" ng:required>
</div>