conversations.from: human
conversations.value: Solve the math problem: In Henry's collection of music CDs, he has 3 more country CDs than rock CDs but twice as many rock CDs as classical CDs. If he has 23 country CDs, how many classical CDs make up his collection?
conversations.from: assistant
conversations.value: Henry has 23-3=20 rock CDs.
  Henry has 20/2=10 classical CDs.