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.

Thespis , or The Gods Grown Old is an operetta by Gilbert and Sullivan .
Thespis , or The Gods Grown Old , is an operatic extravaganza that was the first collaboration between dramatist W. S. Gilbert and composer Arthur Sullivan .