You are given a sentence and a question, construct 2 answer options in a specific format i.e. ['option1','option2']. The answer options have to be text spans from the given sentence. Only one among the options should be the correct answer to the given question. 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.

Sentence: John promised Bill to leave, so an hour later he left. Question: Who left?
['John', 'Bill']

Sentence: Grace was happy to trade me her sweater for my jacket. She thinks it looks dowdy on her. Question: What looks dowdy on Grace?
['jacket', 'sweater']

Sentence: Jane knocked on Susan's door but she did not answer. Question: Who did not answer?

['Susan', 'Jane']

