conversations.from: human
conversations.value: At the pet store, there are 7 puppies and 6 kittens for sale. Two puppies and three kittens are sold. How many pets remain at the store?
conversations.from: assistant
conversations.value: There are 7 + 6 = 13 pets.
  They sell 2 + 3 = 5 pets.
  After the sales, there are 13 - 5 = 8 pets.