We want to take information just for the first drop-down in a select list (cascading) field.
This is an example where we would like to know just de information from the first drop-down.

Here the grafic where all the second drop-down options are showed.

Is there any way to do it?
One option could be using Select List (single choice) first and then select list (cascading) field. I would like to know if there is a better option to have a solution
.
Thank you in advance!