IN: Which person is he?
Technician Stepanic crafted advanced opticals for Leforge since he needed to be able to see well for his duties.
OUT: Technician Stepanic

IN: Which person is he?
Jeremy annoyed Justin so he can leave the room.
OUT: Justin

IN: Which person is he?
Burt installed Joey's software, and he installed his hardware too.
OUT: Burt

IN: Which person is they?
Walmart is promoting their Black Friday sale heavily in commercials, since they are the best medium to get information out to the average consumer.
OUT:
commercials