answer: #Person1#'s reading a book about Yoga and explains to #Person2# the importance of breathing slow, deep, and regularly.
documents: #Person1#: This book I'm reading about Yoga is really interesting.
  #Person2#: I didn't know you did Yoga.
  #Person1#: I don't really practice it regularly yet, I'm just learning about it.
  #Person2#: What have you learned?
  #Person1#: Right now I'm learning about the importance of breathing slow, deep and regularly.
  #Person2#: As opposed to short and shallow?
  #Person1#: Yes. It says here, 'He who only half breathes, half lives. '
  #Person2#: I read something like that once. I think it was, 'Life is in the breath. '