In this task you need to give reasons to justify the pronoun coreference relations. Each of the provided inputs contains a sentence with a target pronoun and a question about how to justify the coreference between a noun phrase and the target pronoun. Good practices involve the discussion about how the descriptions attached to the targeted pronoun relate to the noun phrase candidate in the question. The reasoning could come from one or multiple following knowledge types about commonsense: First: 'Property', the knowledge about property of objects (e.g., ice is cold). Second: 'Object', the knowledge about objects (e.g., cats have ears). Third: 'Eventuality', the knowledge about eventuality (e.g., 'wake up' happens before 'open eyes'). Forth: 'Spatial', the knowledge about spatial position (e.g., object at the back can be blocked). Fifth: 'Quantity', the knowledge about numbers (e.g., 2 is smaller than 10). Sixth: all other knowledge if above ones are not suitable. Write the sentence in natural language.

Sentence: Jane knocked on Susan's door, but there was no answer. She was disappointed.
 Question: Why does the 'She' refer to jane?
Because Jane was the one that got no answer at the door so it's logical she was disappointed.

Sentence: Fred is the only man still alive who remembers my great-grandfather. He was a remarkable man.
 Question: Why does the 'He' refer to my great-grandfather?
Because was is past tense and suggests it is talking about the great-grandfather who is no longer alive.

Sentence: There is a gap in the wall. You can see the garden behind it .
 Question: Why does the 'it' refer to the wall?

Because there is gap garden behind.