{"city":"Edinburgh","population":60,"diameter":9.144}
{"city":"Stockholm","population":63,"diameter":9.652}
{"city":"Florence","population":75,"diameter":10.16}
{"city":"Genoa","population":80,"diameter":10.668}
{"city":"Turin","population":80,"diameter":10.16}
{"city":"Warsaw","population":80,"diameter":11.43}
{"city":"Copenhagen","population":90,"diameter":12.192}
{"city":"Lisbon","population":120,"diameter":14.224}
{"city":"Palermo","population":130,"diameter":14.478}
{"city":"Madrid","population":140,"diameter":14.732}
{"city":"Berlin","population":145,"diameter":14.732}
{"city":"Rome","population":160,"diameter":15.24}
{"city":"Petersburgh","population":180,"diameter":15.748}
{"city":"Venice","population":200,"diameter":16.256}
{"city":"Dublin","population":210,"diameter":16.256}
{"city":"Amsterdam","population":220,"diameter":17.272}
{"city":"Moscow","population":250,"diameter":18.796}
{"city":"Vienna","population":255,"diameter":19.304}
{"city":"Naples","population":380,"diameter":23.876}
{"city":"Paris","population":690,"diameter":31.496}
{"city":"Constantinople","population":900,"diameter":35.052}
{"city":"London","population":1100,"diameter":39.624}