IN: Which person is they?
The police tried to blockade the bridge to prevent the criminals from escaping because they needed to pass this route to gain freedom.
OUT: the criminals

IN: Which person is he?
Steve loved Bush but he did not tell.
OUT: Steve

IN: Which person is it?
The mouse ran from the cat all the way to the kitchen because it chased him.
OUT: the cat

IN: Which person is it?
The infection spread throughout the building because it was airborne.
OUT:
The infection