pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
d,m,d-m,90,,0.19154097301054474,$blah
a,m,a-m,91,0.5845859902235405,,$blah
f,m,f-m,6,0.8336930832963215,,$blah
g,m,g-m,-99,,,$null