TASK DEFINITION: In this task you need to indicate the plausibility of reasoning for the pronoun coreference relations. Each of the provided inputs contains a sentence with a target pronoun and a sentence that justifies which noun phrase the pronoun refers to. Correct reasons do not need to use all the knowledge from the sentence. The resolution of the pronoun coreference relations typically involve 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. You should answer 'Correct' if the reasoning made sense, otherwise, you should answer 'Wrong'.
PROBLEM: Sentence: The drain is clogged with hair. It has to be cleaned.
 Reason: The 'It' refers to the drain because The drain would need to be cleaned to remove the hair. 
 Question: Is the above reasoning correct or wrong? 

SOLUTION: Correct

PROBLEM: Sentence: Bob paid for Charlie's college education, but now Charlie acts as though it never happened. He is very hurt.
 Reason: The 'He' refers to bob because He is very ungrateful Bob paid for Charlie's college education, but now Charlie acts as though it never happened. 
 Question: Is the above reasoning correct or wrong? 

SOLUTION: Correct

PROBLEM: Sentence: I was trying to open the lock with the key, but someone had filled the  keyhole with chewing gum, and I couldn't get it in.
 Reason: The 'it' refers to the key because The leading sentence is about a key, and the second sentence is about something not fitting in. 
 Question: Is the above reasoning correct or wrong? 

SOLUTION:
Correct