Task: Text Simplification
Input (English): the city is what later evolved to be the center of the byzantine empire -lrb- the greek-speaking roman empire of late antiquity and the middle ages -rrb- under the name of constantinople.
Output (English): the city later became the center of the byzantine empire -lrb- the greek-speaking roman empire of late antiquity and the middle ages -rrb- , called constantinople.