menu" aria-labelledby="dropdown10">
                <a class="dropdown-item" href="#">Action</a>
                <a class="dropdown-item" href="#">Another action</a>
                <a class="dropdown-item" href="#">Something else here</a>
              </div>
            </li>
          </ul>
        </div>
      </nav>

      <main role="main">
        <div class="jumbotron">
          <div class="col-sm-8 mx-auto">
            <h1>Navbar examples</h1>
            <p>This example is a quick exercise to il