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: The large ball crashed right through the table because it was made of steel.
 Question: Why does the 'it' refer to the large ball?
Because steel would smash wood.

Sentence: The lawyer asked the witness a question, but he was reluctant to answer it.
 Question: Why does the 'he' refer to the witness?
Because The lawyer asked the witness.

Sentence: John hired Bill to take care of him .
 Question: Why does the 'him' refer to john?

Because John cannot hire himself to take care of himself.