answer: #Person2# tells #Person1# there are some mangoes on sale. #Person1# doesn't know mangoes before and #Person2# says they're sweet and from Central America.
documents: #Person1#: Can you direct me to some fresh produce that's on sale?
  #Person2#: Well, we've got some great mangoes on sale.
  #Person1#: Mangoes? What are mangoes?
  #Person2#: Well, it's a fruit with a big seed in it.
  #Person1#: Can you eat the seed?
  #Person2#: No. Peel the skin with a sharp knife, and throw out the seed.
  #Person1#: Well, how much are they?
  #Person2#: Well, they're on sale today for only $ 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#: You can buy them either ripe or unripe. Unripe ones are hard.
  #Person1#: Where do they grow mangoes?
  #Person2#: The ones that are on sale are from Central America.