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<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
<div class="collapse navbar-collapse" id="navbarNavAltMarkup">
<a class="nav-item nav-link active" href="#">Home
<span class="sr-only">(current)
</span></a>
<a class="nav-item nav-link" href="#">Features
</a>
<a class="nav-item nav-link" href="#">Pricing
</a>
<a class="nav-item nav-link disabled" href="#">Disabled
</a>