First, choose type ‘100’, ‘250’, ‘500’ or ‘all’ to choose the number of urban centres you want to choose – then name that many of the world’s largest urban centres according to the European Commission trying to achieve the highest total population. Keep in mind names of urban centres are not always a city name, can also be an area/district name as well. Info on the definition of an urban centre is below:

https://ghsl.jrc.ec.europa.eu/ghs_stat_ucdb2015mt_r2019a.php