IN: Which person is they?
Animal Control takes control of lost animals in the city because they are hired by the city to perform these duties.
OUT: Animal Control

IN: Which person is they?
Chelsea hate Manchester United because they are too cocky.
OUT: Manchester United

IN: Which person is they?
The invaders showed no mercy to the defenders because they are a vicious and unforgiving people.
OUT: The invaders

IN: Which person is they?
The lifeguards evacuated the swimmers from the public pool since they needed to clean the pool.
OUT:
The lifeguards