about them; on them
I was right about them.
Tell me more about them.
Tell me something about them.
Tell me more about them.
Dobbiamo sapere più cose su di loro.
We need to know more about them.
Ho bisogno di informazioni su di loro.
I need information about them.
I have some news about them.
Ho dimenticato tutto su di loro.
I forgot all about them.
I have a theory about them.
I'm counting on them.