pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
e,o,e-o,-19,0.7447051515651959,0.6636888294845347,$null
f,o,f-o,-85,,,$null
g,o,g-o,-82,0.3970711742472973,0.0187415365856457,$blah
h,o,h-o,15,0.9053062089782412,0.09171356965909339,$blah