Generate a piece of music. The title is Leave her Johnny. It belongs to the genre of Capstan Shanty.  
X:1
T:Leave her Johnny
T:Leave her Johnny
C:Music21
L:1/8
Q:1/4=128
M:4/4
I:linebreak $
K:G
V:1 treble 
V:1
 GA | B2 B2 BA GA | B2 BA G4 | A2 A2 A3 G | B2 d4 d2 | e2 e2 d2 B2 | d2 BA G2 d2 | B3 G B3 A | %8
 A2 G4 x2 || %9  