TASK DEFINITION: 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.
PROBLEM: Sentence: I stuck a pin through a carrot. When I pulled the pin out, it left a hole.
 Question: Why does the 'it' refer to the pin?

SOLUTION: Because a carrot cannot leave a hole in itself.

PROBLEM: Sentence: Jim comforted Kevin because he was so upset.
 Question: Why does the 'he' refer to kevin?

SOLUTION: Because he was so upset.Jim comforted Kevin.

PROBLEM: Sentence: The cat was lying by the mouse hole waiting for the mouse, but it was too cautious.
 Question: Why does the 'it' refer to the mouse?

SOLUTION:
Because The mouse would be the one in need of being cautious in this situation.