conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: Denise will be 25 years old in two years. Her sister, Diane, is 4 years younger. In how many years will Diane be 25 years old?
conversations.from: assistant
conversations.value: Denise is 25 - 2 = 23 years old now.
  So, Diane is 23 - 4 = 19 years old now.
  Diane will be 25 years old in 25 - 19 = 6 years.