instruction:
In this task, based on the given sentence and the question, you are asked to generate an incorrect answer. The incorrect answer has to be a text span from the given sentence. Note that, the correct answer to the given question will require understanding of coreference resolution. Coreference resolution is the 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. 
question:
Sentence: John promised Bill to leave, so an hour later he left. Question: Who left?
answer:
Bill


question:
Sentence: Grace was happy to trade me her sweater for my jacket. She thinks it looks great on her. Question: What looks great on Grace?
answer:
sweater


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

wolves