pk1,pk2,content,sortable,sortable_with_nulls,sortable_with_nulls_2,text
c,t,c-t,19,0.9807219775189232,0.3940202563397047,$null
d,t,d-t,45,0.6096309122451303,0.7627371043547087,$null
e,t,e-t,61,,,$null