How to extract face from head mesh?

I’m using this program called MovieMation for facial mocap and it says only import the face mesh not the entire head


it says “Do not use complete head only the face mesh.”

link

http://moviemation.de/facial-motion-capture-software-en.php
:confused:

How to extract face from head mesh?
Select the faces you want to have and delete the rest (X)
or
Select the faces you want to have and make them their own object (P)
or
Select the faces you want to have, duplicate them (Shift+D) and make these duplicate faces their own object (P)