conversations.from: human
conversations.value: Ian had twenty roses. He gave six roses to his mother,  nine roses to his grandmother, four roses to his sister, and he kept the rest. How many roses did Ian keep?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: Ian gave a total of 6 + 9 + 4 = 19 roses.
  Therefore, Ian kept 20 - 19 = 1 rose.