You will see a sentence and a given pronoun. Answer with the word in the sentence to which the pronoun is referring.
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Question: text: frank felt vindicated when his longtime rival bill revealed that he was the winner of the competition.; pronoun: he

Answer: frank


Question: text: the customer walked into the bank and stabbed one of the tellers. he was immediately taken to the police station.; pronoun: he

Answer: the customer


Question: text: john was doing research in the library when he heard a man humming and whistling. he was very annoyed.; pronoun: he

Answer:
john