Download the following file and open it in CityDesk.
It shows how to define multiple variables in the extra1 field and render them on a page using a FOR loop. Of course, you could use the same technique to display the data within the article body itself.
See the discussion on the CityDesk website for more details until I can get a better explanation posted here. Just click the button below to go there.
I hope you find this useful.
-Stu Greenberg