Data-shapes node convert output type?

I’m trying to collect Revit categories from a selection box using the UI.multipleinputform++ node to run a very simple interference check. My problem occurs when filtering out which categories of elements to run the Tool.IntersectionChecker with. How do I go from the Data-shapes output to a Revit Category?

Try this having a look at this post:

The issue was that I was using Revit Categories instead of Category names earlier in my script, stupid… Resolved