pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
a,x,a-x,50,0.07099308600903254,,$blah
e,m,e-m,50,,0.44654739304319446,$blah
g,c,g-c,50,0.5616833815697281,0.35359807963376766,$blah
g,r,g-r,50,0.4004498163160871,,$null