You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
Indicate a noun phrase from given statement which mentions a pronoun.

this book introduced shakespeare to ovid; it was a fine selection of his writing.
Solution: his writing
Why? in this statement the pronoun is his and his writing is referring to the quote in the sentence using the pronoun

New input: john promised bill to leave, so an hour later he left.
Solution:
he left