Page hero Element - showing current archive's tag

I have created a 'Page hero' element and set it up to display on archive pages (including tag and category archives)
I would like to add a heading which will display the current tag that was selected for viewing.
When using dynamic data I only have the option to list the current post's tags but not the current tag archive tag.
So if the url is: http://www.mysite.com/tag/trucks
I would like the word 'Trucks' to show up in the header.

How can I make that work?

Thanks,
Dan