https://en.wikipedia.org/wiki/List_of_national_capitals
https://www.boldtuesday.com/pages/alphabetical-list-of-all-countries-and-capitals-shown-on-list-of-countries-poster?srsltid=AfmBOooE1FzBztMsF4l0RGRyAoqKF97aFTtSIWLB-OXvZhVT7Ba6JJj8