answer: #Person2# has a toothache and tells #Person1# it might be because #Person2# grinds his teeth while sleeping.
documents: #Person1#: How have you been doing?
  #Person2#: I can't sleep or eat. I have a really bad pain in my tooth!
  #Person1#: How long have you had this toothache?
  #Person2#: It bothers me off and on, but it's gotten much worse these past few weeks.
  #Person1#: Is there anything that you'Ve done to your tooth that might have caused the pain?
  #Person2#: My girlfriend told me that I grind my teeth a lot when I sleep. Maybe that is the problem.
  #Person1#: When you brush your teeth, what do you use?
  #Person2#: I use a soft bristle toothbrush.
  #Person1#: Does it bother you when you have to chew a lot?
  #Person2#: Absolutely. That set it off big time!