Additional generation condition not working properly

Hello,

So I want to add a condition to an ore spawn. I want it to spawn above Y-119, and only at the surface.

Here is what I want to do (if true : ore spawn) :

But here is what MCreator tell me to do :

Because the condition MUST end with a return value. But if I do so, the value will be always false, and so the ore does not sapwn.

I tried other ways like :

Or

And so the ores does spawn above 119, but not at the surface.

How can I do ? There is not enough explanation about that in the Wiki / Documentation...

Thank you in advance !