Please take a look at this:
See? Answers and its question are separated. I mean, they are not link to each other. Also when you open one of the answers, you will see this warning:
Which clearly says (as far as I understand), answers should be a property of a the question.
Ok, I've a Q/A website and implemented schema for it this way
See? You don't see any answer item there (noted that question has 5 answers) and all answers are a property of the question. If you click on the "Question" tab you can see the question with along all its answers.
Now I want to know, I did it right or I should make it like how SO did it?