QUES:
Who is they in the following sentence?

LA Galaxy is constantly seeking famous players to fill their ranks, but they are constantly sought after by many teams with offers.

ANS:
famous players

QUES:
Who is he in the following sentence?

Doctor Jenner continued his work on a vaccine for John, but he is not have much success.

ANS:
Doctor Jenner

QUES:
Who is he in the following sentence?

Student A beat student B, because he studied.

ANS:
Student A