Task: Question Answering
Input (English): My dad told me that it was time for me to go to the dentist.  We went there once every year and it was now time to go there.  I got in my car and I drove down to the dentist's office.  I got checked in and they asked me to wait a while until the dentist could see me.  While I waited, I looked at things on my phone and some of the magazines that were there.  They called my name and I went back to a small room with a chair that I rested in.  The assistants came in and cleaned my teeth with some of their tools.  It was a long time to keep my mouth open, but I knew it was for the best.  The dentist came in and told me that I didn't have any cavities and that I was good to go back home. 
Question: When was the last time they had been to the dentist?
Output (English): A year ago