conversations.from: human
conversations.value: Can you walk me through the solution of: Angelina is 4 years older than Justin is now. In 5 years, Angelina will be 40 years old. Calculate the age of Justin currently.
conversations.from: assistant
conversations.value: In five years, Angelina will be 40 years old, meaning currently she is 40-5 = 35 years old.
  Since Angelina is 35 years old right now, and she is four years older than Justin, it means Justin is 35-4 = 31 years old.