Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: Unlike Henry III, Agnes proved incapable of influencing the election of the new popes, Stephen IX and Nicholas II.

Unlike Henry III, Agnes was not able to affect the election of popes Stephen IX and Nicholas II.