Custom Properties in Drawings

Hi,

I have a custom property in a Solidworks Drawing (accessed using file -> properties ...)

prop1 = "These are examples for a string =  string1 string 2 string3 string4"

is there a way i can create a new custom property that will substring or break prop1

prop2= string1 string 2 string3 string4

and use prop2 property in the drawing title block to show the value ".string1 string 2 string3 string4"

Appreciate all the help.

SolidworksDrawings And Detailing