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.

Input: Consider Input: Sentence: Many people start to read Paul's books and can't put them down. They are popular because Paul writes so well.
 Question: Why does the 'They' refer to paul's books?

Output: Because People love Paul's books. They are popular. So the books are popular, not the people.


Input: Consider Input: Sentence: Thomson visited Cooper's grave in 1765. At that date he had been travelling for five years.
 Question: Why does the 'he' refer to thomson?

Output: Because Cooper was in the grave and therefore couldn't be travelling.


Input: Consider Input: Sentence: Mary took out her flute and played one of her favorite pieces. She has had it since she was a child.
 Question: Why does the 'it' refer to the flute?


Output: Because Mary flute and played one of her favorite pieces.