Question: A dog chewed a bone and it barked.
Based on this sentence, who is it?

Answer: A dog

Question: The police officer shot the protester because he tried to attack the governor.
Based on this sentence, who is he?

Answer: the protester

Question: The policeman finally caught the criminal, because he turned himself in.
Based on this sentence, who is he?

Answer: the criminal

Question: Jackie Chan is starting to become like Chuck Norris since he retired at the age he has now reached.
Based on this sentence, who is he?

Answer:
Chuck Norris