IN: Which person is he?
John appreciated Bill because he had been in need.
OUT: John

IN: Which person is they?
The carpenters came before the painters since they need to paint after the furniture has already been built.
OUT: the painters

IN: Which person is he?
Will Smith got his son in a movie since he is the son of a famous movie actor.
OUT: his son

IN: Which person is he?
Allen chased the leprechaun because he had a pot of gold.
OUT:
the leprechaun