[Solved]Removing a truncated URL from a full URL

Good Morning,

Does anyone know how to remove a truncated URL from a full URL in RapidMiner?

I have two attributes:

truncated URL                                         full URL    
http://www.unisa.ac.za                            www.unisa.ac.za/news/index.php/2014/03/changes-to-mayjune-2014-examination-period/

I would like the new attribute to have
/news/index.php/2014/03/changes-to-mayjune-2014-examination-period

I have converted the attributes from nominal to text attributes.

Thanks for the help.

Regards
Kate