JSFiddle - React, Tailwind, and code Playground
HTML
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<form>
<div class="form-group">
<div class="col-md-2">
<label class="control-label">Straße u. Hausnummer</label>
</div>
<div class="col-sm-10 input-group">
<input type="text" class="form-control" style="width:75%">
<input type="text" class="form-control" style="width:25%">
</div>
</div>
</form>