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: Joe saw his brother skiing on TV last night but the fool didn't have a coat on Question: Who is the fool?
['Joe', 'brother']

Sentence: Joe saw his brother skiing on TV last night but the fool didn't recognize him Question: Who is the fool?
['Joe', 'brother']

Sentence: Dan took the rear seat while Bill claimed the front because his "Dibs!" was slow. Question: Whose "Dibs" was slow?

Bill's, Dan's