conversations.from: human
conversations.value: In 2 years, Maxwell will be twice his sister's age. If his sister is now 2, how old is Maxwell now?
  What is the solution?
conversations.from: assistant
conversations.value: In two years, Maxwell's sister will be 2 years + 2 years = 4 years old.
  Therefore, Maxwell will be 4 years x 2 = 8 years old in two years.
  Maxwell is now 8 years - 2 years = 6 years old.