Why do my answers keep disappearing?

I have had a couple of my answers disappear. I answered a question, and there was nothing bad about it. No selling anything, no dirty words, I even complimented the person on their question. I didn't get a 10 point deduction or what ever you get when you get in trouble. The answer is just gone. Another answer that is gone was in response to where someone could watch the stanley cup final game in dublin. Rather innocuous. I don't get it.