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: The two Byzantine outbreaks during the 8th and 9th centuries were unusual in that the use of images was the main issue in the dispute, rather than a by-product of wider concerns.

Icons were the main issue in the Byzantine disagreements. They came about in the 8th and 9th centuries. They could not agree on which idols or images to destroy.