To recognize a person and to say a personalised text:
#FUNC_face/Name/Basti

That means, first the command:
#FUNC_face/Name/
and then the nickname of the person.

Similar for TargetGroups:
#FUNC_face/TargetGroup/Gamer

first the command:
#FUNC_face/TargetGroup/
and then the name of the Targetgroup.

All the other commands shown in the drop down menu are variables. 
So, when the picture of a person is saved by name, you can create sentences like:

Hello Pepper!    -     Hello #FUNC_face_get_name you look like you are #FUNC_face_get_age years old and if you would not have been #FUNC_face_get_gender I would instantly fall in love with you. But you look quite #FUNC_face_get_mood so it seems as if you are humorous.