You will see a sentence and a given pronoun. Answer with the word in the sentence to which the pronoun is referring.
One example: this book introduced shakespeare to ovid; it was a fine selection of his writing.
Solution is here: his writing
Explanation: in this statement the pronoun is his and his writing is referring to the quote in the sentence using the pronoun

Now, solve this: text: john ordered bill to leave, so an hour later he left.; pronoun: he
Solution:
bill