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.
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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: 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: ['jacket', 'sweater']


Question: Sentence: The archaeologists have concluded that neanderthals lived in Laputa 20,000 years ago. They hunted for evidence on the river banks. Question: Who hunted for evidence?

Answer:
neanderthals, archaeologists