How can i get parrent div data-id

I have

<div class="answers-form"  data-id="1">
       <div class="form-group">
                <label>
                    <input value="" type="checkbox" name="answer[]">
       </div>
          <span></span>
                 </label>
</div>

i need to check, if input is checked, then get div's data-id. please help. Thanks.