Task: Text Simplification
Input (English): offenbach 's numerous operettas , such as orpheus in the underworld , and la belle hélène , were extremely popular in both france and the english-speaking world during the 1850s and 1860s.
Output (English): during the 1850s and 1860s , orpheus in the underworld and la belle hélène were some of the famous offenbach 's operettas in both france and the english-speaking world.