anchor.diff:        onclick="copyLink()"
         class='btn btn-secondary'>Copy URL</button>
     </div>
  -  <div
  -    data-title="Check out this link on crowdAI "
  -    data-desc='Share to Facebook'
  -    data-url='<%= "#{request.base_url}/#{submission.short_url}" %>' >
  +  <div>
  +    <span
  +      data-title="Check out this link on crowdAI "
  +      data-desc='Share to Facebook'
  +      data-url='<%= "#{request.base_url}/#{submission.short_url}?utm_source=crowdAI&utm_medium=Facebook" %>'>
       <a
         class="btn btn-secondary btn-facebook"
         rel="nofollow"
  
positive.code:       href="#">
          <i class="fa fa-facebook-official" aria-hidden="true"></i>
      </a>
      <a
        class="btn btn-secondary btn-twitter"
        rel="nofollow"
        data-site="twitter"
  
negative.code:       href="#">
          <i class="fa fa-twitter" aria-hidden="true"></i>
      </a>
    </span>
    </div>
  </div>
  <!--Detail add comment end-->
  