Generate a piece of music. The title is The traditional tunes of the Child ballads.  
X:1
T:Music21 Fragment
L:1/4
M:4/4
I:linebreak $
K:none
V:1 treble 
V:1
 D | G B A D/D/ | F G D C | B c d d | d3 G | B G B c | d c B B | A G F A | D3 G | B G B c | %10
 d c d B | B A G B | D3 D | G3/2 A/ B D | F G D3/2 c/ | B/>c/ d d d | d3 x || %17  