answer: #Person1#'s looking for some fresh produce on sale. #Person2# recommends mangoes which #Person1#'s never had and tells #Person1# about its price and the taste.
documents: #Person1#: Where is some fresh produce that's on sale? 
  #Person2#: Well, I think you'll like the mangoes. 
  #Person1#: I've never had a mango. 
  #Person2#: It's a fruit. It has a big stone in it. 
  #Person1#: Can you eat the stone? 
  #Person2#: No. You would break all your teeth on it. 
  #Person1#: How much are these mangoes? 
  #Person2#: The sale price today is $1 each. 
  #Person1#: Can you describe their taste? 
  #Person2#: They usually taste sweet, but they remind me of an orange. 
  #Person1#: How can I tell if they're ripe? 
  #Person2#: Don't cut into them until you can feel that they're soft on the outside. 
  #Person1#: What country produces them? 
  #Person2#: They come from tropical countries.