Task: Text Simplification
Input (English): 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.
Output (English): 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 , not by by-product of wider concerns.