Detailed Instructions: In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.
Q: Talking on the phone has always been a regular part of my life. I use the phone every single day to talk to my parents, and occasionally to talk to my friends and other relatives. Just last week, I got a phone call from a friend that lives in my old home town. It was about the middle of the day, and I heard my phone ring. The phone number was unknown to me, and the only thing I recognized was the area code. Because of this, I answered the phone and was pleasantly surprised to hear the voice of one of my good friends on the other line. Once I knew that it was in fact one of my friends, we talked on the phone for about 2 hours just trying to catch up with what we've been doing. By the time I hung up the phone, I was happy knowing that I got to talk to an old friend. 
Question: Where did the caller phone from?
A:
The person's old home town.