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.

Ex Input:
Sentence: Billy cried because Toby wouldn't accept his toy. Question: Who owned the toy?

Ex Output:
['Toby', 'Billy']


Ex Input:
Sentence: Dan had to stop Bill from toying with the injured bird. He is very cruel. Question: Who is cruel?

Ex Output:
['Dan', 'Bill']


Ex Input:
Sentence: Joe saw his brother skiing on TV last night but the fool didn't have a coat on Question: Who is the fool?

Ex Output:

Joe, brother