IN: Which person is he?
Jim Carrey convinced Jeff to travel with him to Aspen, since he wanted to have a travel buddy to visit his girlfriend.
OUT: Jim Carrey

IN: Which person is he?
Steven assassinated the president because he was a too liberal.
OUT: the president

IN: Which person is he?
The boy tried to address his friend, but he could not hear.
OUT: his friend

IN: Which person is it?
The cougar tried to befriend the rabbit because it had a bad reputation as an evil predator.
OUT:
The cougar