Problem: John couldn't see the stage with Billy in front of him because *he* is so short.

Are "he" and "Billy" the same?
Answer: no

Problem: Jim comforted Kevin because *he* was so upset.

Are "he" and "Kevin" the same?
Answer: yes

Problem: The journalists interviewed the stars of the new movie. *They* were very persistent, so the interview lasted for a long time.

Are "They" and "the stars" the same?
Answer: no

Problem: The mothers of Arthur and Celeste have come to the town to fetch them. They are very happy to have them back, but *they* scold them just the same because they ran away.

Are "they" and "mothers" the same?
Answer:
yes