am not sure but you can try this
concatenate four fields in script -- as a one filed
and write the below expression in text object
Product&','&Category&','&Type as New
If technology having two sub values then how you want to see in template?
my actual requirement is,suppose i have two list box year and category.
While i click on year(only one can select) it will show the status(in multiple character) of car or trucks of that year