<human>:  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?
<bot>: How many rock CDs does Henry have? ** Henry has 23-3=<<23-3=20>>20 rock CDs.
How many classical CDs does Henry have? ** Henry has 20/2=<<20/2=10>>10 classical CDs.
#### 10