{% if instance.loc %}
<iframe src="http://maps.google.com/maps?q={{ instance.place_name }}&loc:{{ instance.loc }}&z=15&output=embed" width="600" height="450" frameborder="0" style="border:0" allowfullscreen></iframe>
{% else %}
Map cannot be displayed
{% endif %}

{% if instance.loc %}
	<div class="embed-responsive embed-responsive-16by9">
		<iframe class="embed-responsive-item" src="http://maps.google.com/maps?q={{ instance.place_name }}&loc:{{ instance.loc }}&z=15&output=embed"
			frameborder="0" style="border:0" allowfullscreen>
		</iframe>
	</div>
{% else %}
	Map cannot be displayed
{% endif %}

Add boostrap response classes to iframe.
Add boostrap response classes to iframe.
