To build on what Ronald said, you could do the function combination like so:
to find all the characters after the first >>. To remove all the characters after the second >>, you could use
so that you return all the characters between index 0 and the index of the second >>
I built a small test workflow that produces the results you want. Values are below the Actions
Hope that helps,
See the string function calls documentation here: https://docs.mendix.com/refguide/string-function-calls#find
Use the find option to find the first occurence and use the substring to cut up the string.
Hope this helps,