In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

The Advertising Council , mostly called the Ad Council , is an American non-profit organization that creates public service announcements on behalf of sponsors , including non-profit organizations and the United States government .
The Advertising Council , commonly known as the Ad Council , is an American nonprofit organization that produces , distributes , and promotes public service announcements on behalf of various sponsors , including nonprofit organizations , non-governmental organizations and agencies of the United States government .

The current first lady is Melania Trump .
Melania Trump is the current first lady of the United States , as wife of 45th president of the United States , Donald Trump .

Mac OS X Tiger ( version 10.4 ) is the fifth major release of Apple 's Mac OS X.

Mac OS X Tiger ( version 10.4 ) is the fifth major release of Mac OS X ( now named macOS ) , Apple 's desktop and server operating system for Mac computers .