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: Tom said "Check" to Ralph as he moved his bishop.
 Question: Why does the 'his' refer to tom?

Output: Because Tom said check to Ralph because he was moving his own bishop and therefore want's Ralph to check.


Input: Consider Input: Sentence: Stretching her back, the woman smiled at the girl.
 Question: Why does the 'her' refer to the woman?

Output: Because it seems the stretching and smiling are the same person.


Input: Consider Input: Sentence: Sam pulled up a chair to the piano, but it was broken, so he had to sing instead.
 Question: Why does the 'it' refer to the piano?


Output: Because You assume he sang instead because the piano was broken.