Build array from nodes from RSS where keys contain colons Probably pure twig:

I am building an array from nodes taken from a RSS-feed where one of the keys contains a colon which of course breaks everything. Like so:

Node in feed: 

&lt;media:thumbnail url="stuff I like to get." /&gt;


My twig:

{% for node in feed %}
        {% set latestArticles = latestArticles|merge([{
                'timestamp': node.pubDate|atom,
                'title': node.title,
                'uri': node.link,
                'description': node.description,
                'thumbnail' : node.media:thumbnail,
            }]) %}
        {% endif %}
    {% endfor %}


So how do I get media:thumbnail?

I have tried different things but without luck.
As @mats-mikkel-rummelhoff suggested, that data type is an array. So I was able to get the desired value by using:

'img' : node['media:content'][1]['@url']


Thanks, Mats.