conversations.from: human
conversations.value: Four years ago, Kody was only half as old as Mohamed. If Mohamed is currently twice 30 years old, how old is Kody?
conversations.from: assistant
conversations.value: Mohammed is currently 2*30 = 60 years old.
  four years ago, Mohammed was 60-4 = 56 years old
  Four years ago, Kody was half Mohammed's age, which is 56/2 = 28 years old.
  Currently, Kody is 28+4 = 32 years old