IN: Which person is they?
The Board of Directors fired the management from the company since they were not managing the company well.
OUT: the management

IN: Which person is they?
Lions love gazelles because they eat them.
OUT: Lions

IN: Which person is it?
The plane shot the rocket at the target, then it blew up.
OUT: the target

IN: Which person is they?
The boy scouts were able to raise more money for charity over the girl scouts since they had a very active fund raising schedule.
OUT:
The boy scouts