IN: Which person is it?
He put snow on the smiley face because it was dry.
OUT: the smiley face

IN: Which person is he?
Bill returned Jim twenty dollars because he borrowed money.
OUT: Bill

IN: Which person is she?
Snooki got angry at Kendra since she is upset that her friend would not comfort her.
OUT: Snooki

IN: Which person is they?
Soldiers of the armed forces were slowly being phased out by genetically engineered soldiers since they were physically inferior to their new counterparts.
OUT:
Soldiers of the armed forces