about them
Fue lo último que oí sobre ellos.
That was the last I heard from them.
Tenemos toda la ventaja sobre ellos.
We have a significant advantage over them.
I don't remember anything about them.
Debería haber un verso sobre ellos.
There should be a verse about them.
He leído sobre ellos y creía que podía controlarlo.
I read about them and thought I could control it.
What do you know about them?
Tell us about them.