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.
Q: The Ancient Olympic Games were a series of athletic competitions held between the city-states of Ancient Greece .
A: 
The Olympic Games ( , " Olympia " , " the Olympics " ; also , , " the Olympiad " ) were a series of athletic competitions among representatives of city-states and one of the Panhellenic Games of ancient Greece .