pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
c,n,c-n,96,,0.2745974469175383,$null
a,n,a-n,-77,,0.62744604170309,$null
f,n,f-n,-45,0.44338308606070165,0.6856802654812854,$blah
b,n,b-n,-60,0.43818457300770985,0.9872330636315043,$null