Multiple Pass Variable Expansion

I found this post (http://stackoverflow.com/questions/29276198/ansible-how-to-construct-a-variable-from-another-variable-and-then-fetch-its-v) and was hoping to find a way to cope with it.

To sum up though, basically I have a situation where I’d like to get the value of a value of a variable.

e.g.:

defaults/main.yml: