Simplify the following text for a Grade 11 native English-speaking person.
Original: To this end , : \* Permission is granted to copy , distribute and\/or modify Wikipedia 's text under the terms of the Creative Commons Attribution-ShareAlike 3.0 Unported License and , unless otherwise noted , the GNU Free Documentation License . unversioned , with no invariant sections , front-cover texts , or back-cover texts .
Simplified: Permission is granted to copy , distribute and\/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections , with no Front-Cover Texts , and with no Back-Cover Texts .