instruction:
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.
question:
Sentence: Fred is the only man alive who still remembers my father as an infant. When Fred first saw my father, he was twelve years old. Question: Who was twelve years old?
answer:
['Fred', 'father']


question:
Sentence: The doctor informed Kate that she had retired and presented several options for future treatment. Question: Who had retired?
answer:
['Kate', 'doctor']


question:
Sentence: Tom gave Ralph a lift to school so he wouldn't have to walk. Question: Who wouldn't have to walk?
answer:

Ralph, Tom