You need to read the given sentence and construct a question about the information present in the sentence. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is unique. The question must involve coreference resolution which is a task of clustering mentions in text that refer to the same underlying real world entities. For example let's take a sentence 'I voted for Obama because he was most aligned with my values, she said.' Here in this example 'I', 'my', and 'she' belong to the same cluster and 'Obama' and 'he' belong to the same cluster. Now let's discuss another example , original sentence: 'I voted for Trump because he was most aligned with my values',John said. Now here is the same sentence with resolved coreferences: 'John voted for Trump because Trump was most aligned with John's values',John said.

Sentence: There are too many deer in the park, so the park service brought in a small pack of wolves. The population should increase over the next few years.
Which population will increase?

Sentence: Dan had to stop Bill from toying with the injured bird. He is very cruel.
Who is cruel?

Sentence: The journalists interviewed the stars of the new movie. They were very persistent, so the interview lasted for a long time.

Who was persistent?