Create an additional PDB with response files

Hi,

I've already created an Oracle 12c DB with one PDB but now I would like to add an additional PDB.

How can I achieve that using response files with DBCA?

I know If I use the DBCA GUI, it's pretty straightforward to do it, but I can't figure it out with response files.

The template for the DBCA response file includes many variables, and I'm uncertain which ones should I set only to create an extra PDB and not the a whole CDB.