using `template` to create exact mapping

[djarecka]

I want to create exact mapping from the column, but in order to do it, I have to:

• add prefix
• replace spaces with "%20".

I found an example to do the first one, by using curie_prefix, but I was wondering if the second thing I couldn't resolve using template, but I'm not sure how to use it. It seems to not have any effect when I'm trying